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Physics 101 Mechanics
October 2021
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Physics 101 Mechanics
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October 19 of 2021
Ic next (WO Questions PII the Same Descnbed Back the Origin It is Made of {J1 Insulating Wancrualed Cases. A solid sphere of radius a is centered with shape = 1: Its surrounded by a hollow concentric uniform charge density shell of inner radius b and outer radius c. The shell has a total chargeā¦
The text below contains several errors in spelling, typographical, grammatical, OCR (optical character recognition), and mathematical aspects. Additionally, there are errors related to the square root symbol. Please review the corrected text for proper formatting and clarity. Text: Theā¦
The following three charges (Q1, Q2, and Q3) are arranged on the x-axis as shown in the figure. Q1 is located at the origin (0,0) and Q2 is located at (0,-4). Find the energy stored in the charge configuration of Q1, Q2, and Q3, and the work that is required to assemble the three charges. Theā¦
U-shaped wire has a metal bar sliding across at 10 meters per second. The bar has a width of 0.3 meters. The apparatus is placed in a 3 Tesla magnetic field that is directed into the paper. What is the magnitude of the induced emf? What is the direction of the induced current? Io * Is
15 years ago, a small film called "The Matrix" introduced a new concept to moviegoers. It was a mind-bending experience that left audiences questioning reality. In Texas, a man named Neo is living a double life. During the day, he is a computer programmer, but at night, he becomes a hacker. Oneā¦
The power transmitted by any harmonic wave varies directly as the square of the amplitude and the square root of the frequency. None of these is correct.
Of students performing an experiment in a diffraction lab using a light source on a screen. The distance between the screen and the light source is (2.212+0.05)m. Determine the initial position of the light sensor and measure the diffraction pattern of the slit for this experiment (withā¦
Maximum emf of an ac generator is 19. An ac generator operates at a rotational frequency of 60 Hz and produces a maximum emf of 100 V. Assume that its output at t=0 is zero. What is the instantaneous emf (a) at t=1/240 s? (b) at t=1/120 s? (c) at t? (d) How much time elapses between successiveā¦
An AWG # 12 copper wire conductor has an 80.8 mil diameter. A 50-foot length carries a current of 20 Amperes Find a) the current density J flowing through the wire, b) the electric field intensity E within the wire, c) the voltage drop across the conductor, and d) the resistance R ofthe 50-footā¦
Involves nonzero amount of work? Was Professor943g Farson took demonstration against wall 12. The amount of work done Horace Newton '88877g and 80 degrees along same displacement Joules EJ Joules {@= JDulgs 13. State the Work Energy Principle' 14. If a particular force does work on an object,ā¦
An object has an initial velocity of 8.245 m/s. The initial velocity of the center of mass is 3.8 m/s. The object has a mass of 40 kg. The initial momentum of the object is 9686 kgĆĀ·m/s. The initial kinetic energy of the object is 53.38 kJ.
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Need Help? LpJ> S-PSEQ 32P 044 Duttery resistor and inductor response. I calculate the following: The power being supplied to the inductor. The power being delivered to the resistor. The energy stored in the magnetic field of the inductor. Need Help?
Martian and Venutian Barometer Mercury (Pue 136kg/mĆĀ³ = aromatic work by atmospheric pressure supporting a vertical column of liquid mercury in a sealed glass tube with no air. The formula pgh Patm uses the height of the column to calculate atmospheric pressure. Find the height of the column onā¦
Each cell (battery) and resistor shown below is a part of an electrical circuit. At which point (A or B) is the electronic potential higher? Find the following voltages: (a) AVAB (b) AVM (c) R-1 (d) Ć¢āĀ¬eSv At which point (A or B) is the electricā¦
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Question 9: Which of the following is arranged in order of increasing wavelength? infrared; visible; ultraviolet; X-rays Question 10: What is the speed of light in a vacuum? 0.86
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Text: (334.3/41 capacitor and (15.010.15)9 An alternating RC circuit constructed with a voltage source that has frequency resistance connected in series with the supplied EMF and the current 100 Hz. Determine phase angle between the circuit and the amplitude of the voltage drop across theā¦
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Problem 14.13 A mass attached to a horizontal spring oscillates at a frequency of 5.50 Hz. The mass is located at x = 6.60 cm and has a displacement of 16.0 cm. Determine...
A 100 W light bulb has about 1.44 ampere resistance. How many bulbs would have to be added in series to blow the fuse? Please explain your reasoning.
Two plane mirrors make the angle of 38.0ĆĀ° between them. A ray of light incident on one of the mirrors is reflected and hits the second mirror. Find the angle between the ray incident on the first mirror and the ray reflected off the second mirror.
A wheel with a diameter of 2.05 m lies in a vertical plane and rotates about its central axis with a constant angular acceleration of 4.40 rad/s^2. The wheel starts at rest at time t, and at this time, the radius vector of a certain point on the rim makes an angle of 57.30ĆĀ° with theā¦
d1 = 100m d3 = S0m To get a for d3 formula: ~Vo + a ~20 a(5) divide 5 by both sides to get a alone a = -Amls^2 100m + 400m + S0m = 550m / 35s = 15.7mls 46) An attacker at the base of a castle wall 3.65m high throws a rock straight up with speed Z 40m/s from a height of 155m above the ground.ā¦
(Spts) The frequency of a 2V peak-to-peak symmetrical square wave signal applied to an amplifier becomes essentially triangular, with amplitude of nearly 1V and frequency of 500 Hz. What is the slew rate of this 2V peak-to-peak input amplifier?
Question 3: (5 points) The circuit shown in the figure below - when the capacitor is fully charged, what is the magnitude of the charge on the plates? 2.0 V = 12 V R = 4.0 ĆĀ© C = 9.0 ĆĀ¼F
As shown in the figure, two blocks of unequal mass are connected by an ideal string over a massless, frictionless pulley. If the blocks move at constant speed (consider both moving up and down the incline) and given that the coefficient of kinetic friction between the Zm block and the inclineā¦
Study Problems: Module Four - Conservation of Momentum (Chapter 9) A cannon and a supply of cannonballs are inside a sealed railroad car, as shown in the diagram below. The cannon fires to the right, causing the car to recoil to the left. The cannonballs remain in the car after hitting the farā¦
The current of 1.8 A flows through a wire. The figure below shows a magnetic field of 12 T. Find the total force on the wire and show that it is the same as if the wire were straight instead of bent at a 3 cm segment.
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cylindrical capacitor consists of solid inner conducting core with radius 0.270 cm surrounded by an outer hollow conducting tube_ The two conductors are separated by air and the ength of the cylinder is 13.5 cm The capacitance is 36.5 pF
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An escalator joins one floor with another one 25 ft above. The escalator is 40 ft long and moves along its length at 2.0 ft/sec. (a) What power must its motor deliver if it is required to carry a maximum of 100 persons per minute, of average mass m=5.0 slugs? (b) A W=160-lb man walks up theā¦
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Determine the moment of the force about the point. Express the result as a Cartesian vector. F = |-61+4j+8k| kN 2 m^2
Consider a RC circuit shown in the figure below, for which R = 10ĆĀ© and C = 4ĆĀ¼F. Find the time constant Ćā of the circuit. What is the maximum charge on the capacitor when the switch is closed? Calculate the current flowing through the circuit at t = 5ms after the switch is closed.
Two men exert forces of F = 80 lb and P = 50 lb on the ropes. Determine the moment of each force about A. Which way will the pole rotate, clockwise or counterclockwise?
An athlete jumps off the ground with a speed of 4.0 m/s. If he rebounds off the floor with a speed of 0.0 m/s, calculate the initial kinetic energy of the athlete before the collision. Calculate the total kinetic energy after the collision. What happens next? Please explain.
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Determine the components of the support reactions at the fixed support A on the cantilevered beam; L = 5 m 4 L = 5 m I = 1.5 m (Q)
The towline exerts a force of P = 6 kN at the end of the 8-m-long crane boom. If Īø = 30Ā°, determine the placement x of the hook at B so that this force creates a maximum moment about point O. What is this moment?
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Using the same system as W34, five charges = 1 HH aMC 45 uie 1 correction of the electric field. 4 charges are placed on a regular pentagon located at the origin of an X-Y coordinate system. The separation between each charge is 1.3 units. If two charges are placed 1.3 units apart from eachā¦
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York College Physics The City University of New York Experiment No. Pre-Lab Questionnaire Data were obtained using a machine called an excimer. The following distances were recorded: 0.20 0.10 535 0.539 932 Explain the third reading. Should it be discarded or repeated? It may be a measurementā¦
The vector position of a particle moving in the XY plane varies in time according to r = (31 + 3j)t + 2j12, where t is in seconds and r is in centimeters. At the same time, the vector position of another particle varies as r2 = 31t^2 + 6jt. (a) Determine the vector position of the center ofā¦
A string that is 0.26 m long is vibrating in its "nth harmonic. The sound from this string resonates with a pipe that is 0.881 m long and open at both ends. What is the common resonant frequency of the string and the pipe? The speed of sound in air is 340 m/s.
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Figure: The spacing between the surfaces of two parallel metal plates is changed while the voltage between the plates is measured.
A ball is thrown straight up with enough speed s0 that it is in the air for several seconds. Assume the positive direction is upwards. What is the velocity of the ball when it reaches the highest point? Express your answer to two significant figures and include the appropriateā¦
It is important to note that inertia relates to the weight of an object. The concept of inertia is closely related to the motion of an object. The mass of an object affects its inertia. The more mass an object has, the greater its inertia. Inertia is a property of matter that resists changes inā¦
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Calculate New York's 300-foot high Civicaton Tower oscillates in the wind with a period of 6.80 seconds.
Calculations: How many oscillations? Counting 76 heartbeats in 5 seconds. What is the period and the frequency?
The curve to the right shows the radioactive decay of a particular sample of a nucleus called Element A. If a particular nucleus survives for the first 5 hours, what is the probability that the particular nucleus of Element A will decay between 5 hours and 10 hours? What is the probability thatā¦
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Charges placed on a spherical ball with side 2a shown. Find electric field and potential at a point in the center of GCUA TC. Figure A uniformly charged spherical ball with radius and volume charge density placed in an infinite linear dielectric medium with dielectric constant. Find electricā¦
point) 5 9 For the circuit shown in the figure above; Find the current in the three branches_ What is the potential VA VB Assume Vi = 15 V, Vz 10 V and Vs 12V
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Previous Problem List Next point) car battery has terminal potential difference of 13.4 V when there is no load When the starter motor draws 75 A, the terminal potential difference drops to 10.4 v. What is the internal resistance of the battery?
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For the circuit shown in the figure above, find the current in each resistor. Assume V = 6V and Vz = 4V. 4-ohm resistor: 2-ohm resistor: 3-ohm resistor: Note: You can earn partial credit on this problem.
The space station shown below contains all the appropriate space such as astronaut standing on the outer wall (where shown) has tangential speed and experiences centripetal acceleration of 9.8 m/sĆĀ². Astronaut Christina Koch rides a bicycle = QW[cwall that her total tangential speed is 21, andā¦
Electric flux (For reference) NĆĀ·m^2/C passes through a flat horizontal surface that has an area. The flux equation is on page 637 of the 8th edition of "Principles of Physics" by Serway and Jewett. The uniform electric field points 156 above horizontally. Find the magnitude of the electricā¦
Iodine We point) An ideal battery connected to an external resistor. When 50 ĆĀ© is added, the current drops from 9.6 A to 6.2 A. Find the value of the resistor and the emf of the battery. emf Note: You can earn partial credit on this problem.
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Lab: Charged Particle in a Magnetic Field Conservation of Energy and Uniform Circular Motion Vector Product and Archimedes' Rule: c = i * B Magnetic Field (B) experienced by a moving charged particle: R = q * v * B Our experiment involves a charged particle experiencing a magnetic field atā¦
On top of the King City High School building, near the top, the elevator begins to slow down. Which diagram below best represents the directions and magnitudes of the forces on Tom?
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The analog clock moves. The "second hand" makes a revolution every minute. If the length of the second hand from the rotation point to its tip is 6.7 cm, how far does the tip of the second hand travel in one day? 491 m, 9.0448 m, 9.648 m, 606 m, 1.536 m
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The velocity components of a moving object in the y-plane change as follows: 50 m/s, 3.0 m/s^2, 5.0 m/s^2, and 7.0 m/s^2 in 3.0 seconds. (a) What is the work done on the body? (b) What is the average power delivered to the body? An escalator connects one floor with another above. The escalatorā¦
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Problem 7.19 Part A The figure (Figure 1) shows two strong magnets on opposite sides of a small table. The long-range attractive force between the magnets keeps the lower magnet in place. Draw a free-body diagram for the upper magnet. Draw the vectors starting at the black dot. The locationā¦
So here is the text: Ind % in &t0 Each of the steps shown below indicate the net charge. How does the charge electrostatic equilibrium has been reached? Can the CHA charged sphere? Charge on 1r- unchanged until a small charge is brought near it Charge on Y: third ballā¦
More Friction Problems 1. A 60.0 N force is applied at an angle of Īø = 35.0Āŗ to a 8.00 kg block pressed against a rough vertical wall and the block slides down the wall at constant velocity. Calculate the coefficient of kinetic friction between the block and the wall. a. Draw a FBD of theā¦
A block with unknown mass M is placed on a frictionless inclined plane with a slope angle of 30.0ĆĀ° and connected to a second hanging block with a mass of 3.35 kg by an ideal string and a small, frictionless pulley as shown in the figure on the chalkboard. The blocks, once released, remainā¦
Four capacitors are connected. (GAF #f H/-B Acsf 2JlF Calculate the charge on each capacitor, taking Av as the voltage.
small cube of mass m slides down circular path of radius R cut into large block of mass M_ The block of mass MM rests on table; and both the cube and the block move without friction and are initially at rest. The cube of mass m starts from the top of the path_ Find the velocity of the cubeā¦
Problem: Charge +4 C is fixed at the origin, while charge -3 C is on the Y-axis, 3 m as shown. What is the resultant electric potential V at the point axis - m from the origin (taking V = 0 at infinity)?
Text: Force Problems For each problem, make sure to draw a clear Free Body Diagram (FBD) solution. Show all relevant forces, including tension, normal force, and weight. Problem 1: A force of 24 kN is applied to pull a 10 kg block across the floor with an acceleration of 9 m/s^2. What is theā¦
Verical and horizontal lines. Point Cm from the origin (the crossing of all the charges are 15 force charge of +0 calculate magnitude of the +3.0 AC, then the above figure placed the origin.
The corrected text is as follows: "The dry density (Pa) and wet density (p) of the soil were found to be 2.70. To calculate W, Pa (the dry density), and p (the wet density) of the soil, derive the equation for p' (the submerged density) in terms of n, Ć¢āĀ¬C, and Pa. Derive the formula in twoā¦
Texts: y (m) ~3 nC 5 nC ~1 72 33 ~4 ~5 ~5 55 nC ~3 - 0 1 2 3 4 5 What is the magnitude of the resulting force on the 5 nC charge at the origin? The value of the Coulomb constant is 8.98755 x 10^9 NĆĀ·m^2/C^2. Answer in units of N.
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Today's speed is higher than yesterday's speed. Explain the concept of density. Every day, the speed of an individual increases. What does the symbol "Ph" stand for? Explain the concept of velocity. Draw a diagram to represent the velocity of an object moving in a straight line. The formula forā¦
Q3. A single capacitor of capacitance C1 is connected to a battery. Then a second capacitor of capacitance C2 is added in parallel with C1. Carefully explain all your answers to the following questions: (i) Does the potential difference across C1 increase, decrease, or stay the same compared toā¦
For the circuit to the right; consisting of three ideal batteries and three ideal resistors, calculate the current through point P. Let the sign of the current correspond to its direction, with "up" being positive. Given: V1 = 29.5 V, V2 = -15.0 V, V3 = 27.0 V; R1 = 1.30 kĆĀ©, R2 = 14.0 kĆĀ©, R3ā¦
A 2 MHz linearly-polarized wave with an electric field modulus of 10 V/m is traveling in a dielectric medium with ĆĀµr = 4 in the positive y-direction. Write an expression for the phasor and instantaneous forms of the electric and magnetic fields, given that the field is at a positive maximum atā¦
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During this time, we will deliberate through the topic of violent lightning bolts. Specifically, we will examine the amount of charge delivered by a lightning bolt. The lightning bolt is connected to a battery charger, which delivers a voltage of 12V. We want to determine the amount of energyā¦
Battery 6. In the circuit given below, the capacitance between points charge stored in C2 (C). What
An object with a mass M = 250 g is at rest on a plane that makes an angle 0 = 30" above the horizontal: The coefficient of kinetic friction between M and the plane is Hk = 0.100. Mass M is attached by a string to another mass, m = 200 g, which hangs freely: When mass m has fallen 30.0 cm, itsā¦
2b Or Figure 16.37. Exercises 16-1, 16-2, 16-3, 16-13, 16-14, and 16-17.
Liquid kerosene flows through a Venturi meter; as shown in Fig: The pressure of the kerosene in the pipe supports columns of kerosene that differ in height by 12 cm Determine the difference in pressure between points and b_ in kPa. Does the pressure increase O decrease as the kerosene flowsā¦
12.4 ĆĀ© resistor; inductor 300 mH and 0.00 ĆĀ¼F capacitor connected in series to an alternating current having an amplitude = 10.0 V and angular frequency of 300 rad/s. Find the circuit impedance, the VR, VL, VC values, the phase angle, and the RMS current.
Machine NASA 760 E steel chute is pulled square 2/64 classic released when the elastic cord has 1J0 kinetic force. What is the acceleration of the chute? All head Plkiocfeehes directive Elastic cord Pin A
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The helicopter P1,67 shown two people pulling a stubborn mule. The person on the right pulls with an inner magnitude of [ZON and direction 6jO.o? - The person on the left pulls with force F, magnitude 80.0N and direction of 62 7509. Find the single force that is equivalent to the two forces.ā¦
(12 CH 7) What is the tension in the rope in the figure below (neglect the inertia of the pulley and the mass of the rope)? Lea! + 1OO ke
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Notes Evaluate Feedlnar nat Equipotential lines/surfaces Select all that are true: - are perpendicular to the electric field. - are closer together where the electric field is stronger. - are lines/surfaces that change potential as you move along the line/surface (but stay on the same one). -ā¦
At what distance would the Sun have t0 be in order to have the same A parent magnitude as 100 W light bulb found at 100 m away? Express your answer in Ly
Problem 2 The hockey puck has a diameter of 7.6 cm, a thickness of 2.54 cm, and a mass of 170 grams. During motion, the air film under the puck can be estimated to be about 1 mm thick. Calculate the time required after impact for the puck to lose 10 percent of its initial speed. Problem ? Theā¦
In Capstone, you might acquire position vs. time data for your simple harmonic oscillator that look like the example below: How could you measure the period of oscillation directly from the sinusoidal graph? A sine function has also been fit to these data, with parameters in the white box. Inā¦
Given that a positive point charge of 31nC (31*10^9) is surrounded by an equipotential surface with a radius of rA = 0.24m. A positive test charge of 67pC (0.67*10^-12C) moves from surface A to another equipotential surface B, which has a radius of rB. The work done by the mover as the testā¦
Two Women Your consulting agency, with its extensive knowledge of physics, has been subpoenaed to provide expert testimony in an automobile accident case in civil court. The case involves a crash between a Ford Escort car and a tractor-trailer truck. The police department determined that theā¦
Solve the following problem: The launching mechanism of a toy gun consists of a spring as shown in the figure. To load the gun, you have to compress the spring a distance of x = 0.12 m by applying a force F = 6 N. Then the gun is fired vertically as shown, launching a 20.0 g projectile fromā¦
A steel beam is under a compressive load that causes a strain of 0.01. Find the stress on the beam.
A dog chasing a ball starts at rest and accelerates uniformly over a distance of 5 meters. It takes the dog 1 s to cover that first 5 m. What is the dogās acceleration, and what speed is the dog travelling when it reaches the 5 m point?
During a particular car crash, it takes just 0.18 s for the car to come to a complete stop from 50 km h?1 . (a) At what rate is the car accelerating during the crash? (b) How many times larger than the acceleration due to gravity is this?
The Time T Required For An Object To Fall From Rest Through A Height H Is Given By T = H^P Squareroot 2/G In This Expression, G Is The Acceleration Due To Gravity. Find The Power P That Makes This Equation Dimensionally Consistent. Express Your Answer To One Significant Figure.
An aluminum wing on a passenger jet is 31 m long when its temperature is 28Ā°C. At what temperature would the wing be 8 cm (0.08 m) shorter?
A machinist wishes to insert a copper rod with a diameter of 7 mm into a hole with a diameter of 6.991 mm. By how much would the machinist have to lower the temperature (in Ā°C) of the rod to make it fit the hole?
During a particular car crash, it takes just 0.18 s for the car to come to a complete stop from 50 km h?1 . (a) At what rate is the car accelerating during the crash? (b) How many times larger than the acceleration due to gravity is this?
A bullet mass 10 gm is fired from a gun of mass 1kg. If the recoil velocity is 5 m/s, the velocity of the muzzle is
Two forces of magnitude F have a resultant of the same magnitude F. The angle between the two forces is
An object is subjected to a force in the north-east direction. To balance this force, a second force should be applied in the direction (a) North-East (b) South (c) South-West (d) West
If two forces of 5 N each are acting along X and Y axes, then the magnitude and direction of resultant is
The resultant force of 5 N and 10 N can not be (a) 12 N (b) 8 N (c) 4 N (d) 5 N
bullet of mass 5 g is shot from a gun of mass 5 kg. The muzzle velocity of the bullet is 500 m/s. The recoil velocity of the gun is (a) 0.5 m/s (b) 0.25 m/s (c) 1 m/s (d) Data is insufficient
bullet of mass 0.1 kg is fired with a speed of 100 m/sec, the mass of gun is 50 kg. The velocity of recoil is
The momentum of a system is conserved [CPMT 1982] (a) Always (b) Never (c) In the absence of an external force on the system (d) None of the above
body of mass 0.25 kg is projected with muzzle velocity 1 100 ? ms from a tank of mass 100 kg. What is the recoil velocity of the tank (a) 1 5 ? ms (b) 1 25 ? ms (c) 1 0.5 ? ms (d) 1 0.25 ? ms
force of 50 dynes is acted on a body of mass 5 g which is at rest for an interval of 3 seconds, then impulse is
A dog chasing a ball starts at rest and accelerates uniformly over a distance of 5 meters. It takes the dog 1 s to cover that first 5 m. What is the dogās acceleration, and what speed is the dog travelling when it reaches the 5 m point?
Rocket engines lift a rocket from the earth surface because hot gas with high velocity [AIIMS 1998; JIPMER 2001, 02] (a) Push against the earth (b) Push against the air (c) React against the rocket and push it up (d) Heat up the air which lifts the rocket
Rocket engines lift a rocket from the earth surface because hot gas with high velocity (a) Push against the earth (b) Push against the air (c) React against the rocket and push it up (d) Heat up the air which lifts the rocket
rocket of mass 1000 kg exhausts gases at a rate of 4 kg/sec with a velocity 3000 m/s. The thrust developed on the rocket is (a) 12000 N (b) 120 N (c) 800 N (d) 200 N
A rope of length 5m is kept on frictionless surface and a force of 5N is applied to one of its end. Find tension in the rope at 1m from this end [RPET 2000] (a) 1 N (b) 3 N (c) 4 N (d) 5 N
The motion of a rocket is based on the principle of conservation of [AFMC 2000] (a) Mass (b) Kinetic energy (c) Linear momentum (d) Angular momentum
When the speed of a moving body is doubled [UPSEAT 2004] (a) Its acceleration is doubled (b) Its momentum is doubled (c) Its kinetic energy is doubled (d) Its potential energy is doubled
A wagon weighing 1000 kg is moving with a velocity 50km/h on smooth horizontal rails. A mass of 250 kg is dropped into it. The velocity with which it moves now is (a) 2.5 km/hour (b) 20 km/hour (c) 40 km/hour (d) 50 km/hour
If a force of 250 N act on body, the momentum acquired is 125 kgm/ s. What is the period for which force acts on the body (a) 0.5 sec (b) 0.2 sec (c) 0.4 sec (d) 0.25 sec
A body, whose momentum is constant, must have constant [AIIMS 2000] (a) Force (b) Velocity (c) Acceleration (d) All of these
A force of 100 dynes acts on a mass of 5 gram for 10 sec. The velocity produced is (a) 2000 cm / sec (b) 200 cm / sec (c) 20 cm / sec (d) 2 cm / sec
A ball of mass m moves with speed v and it strikes normally with a wall and reflected back normally, if its time of contact with wall is t then find force exerted by ball on wall
ball of mass 0.5 kg moving with a velocity of 2 m/sec strikes a wall normally and bounces back with the same speed. If the time of contact between the ball and the wall is one millisecond, the average force exerted by the wall on the ball is
gun of mass 10kg fires 4 bullets per second. The mass of each bullet is 20 g and the velocity of the bullet when it leaves the gun is 300 msā»Ā¹. The force required to hold the gun while firing is
The time in which a force of 2 N produces a change of momentum of 10.4 kg ms in the body is
small balls each of mass m impinge elastically each second on a surface with velocity u. The force experienced by the surface will be
10,000 small balls, each weighing 1 gm, strike one square cm of area per second with a velocity 100 m/s in a normal direction and rebound with the same velocity. The value of pressure on the surface will be
A man is at rest in the middle of a pond on perfectly smooth ice. He can get himself to the shore by making use of Newton's (a) First law (b) Second law (c) Third law (d) All the laws
A cannon after firing recoils due to [EAMCET 1980] (a) Conservation of energy (b) Backward thrust of gases produced (c) Newton's third law of motion
Swimming is possible on account of [AFMC 1998, 2003] (a) First law of motion (b) Second law of motion (c) Third law of motion (d) Newton's law of gravitation
When we jump out of a boat standing in water it moves (a) Forward (b) Backward (c) Sideways (d) None of the above
A man is standing at a spring platform. Reading of spring balance is 60 kg wt. If man jumps outside platform, then reading of spring balance [AFMC 1996; AIIMS 2000; Pb. PET 2000] (a) First increases then decreases to zero (b) Decreases (c) Increases (d) Remains same
Newton's third law of motion leads to the law of conservation of (a) Angular momentum (b) Energy (c) Mass (d) Momentum
A man is carrying a block of a certain substance (of density 1000 ?3 kgm ) weighing 1 kg in his left hand and a bucket filled with water and weighing 10 kg in his right hand. He drops the block into the bucket. How much load does he carry in his right hand now (a) 9 kg (b) 10 kg (c) 11 kgā¦
A man is standing on a balance and his weight is measured. If he takes a step in the left side, then weight [AFMC 1996] (a) Will decrease (b) Will increase (c) Remains same (d) First decreases then increases
Action and reaction forces act on (a) The same body (b) The different bodies (c) The horizontal surface (d) Nothing can be said
A machine gun fires 20 bullets per second into a target. Each bullet weighs 150 gms and has a speed of 800 m/sec. Find the force necessary to hold the gun in position [EAMCET 1994] (a) 800 N (b) 1000 N (c) 1200 N (d) 2400 N
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A student attempts to pull himself up by tugging on his hair. He will not succeed (a) As the force exerted is small (b) The frictional force while gripping, is small. (c) Newton's law of inertia is not applicable to living beings. (d) As the force applied is internal to the system.
book is lying on the table. What is the angle between the action of the book on the table and the reaction of the table on the book [Kerala PMT 2005] (a) 0Ā° (b) 30Ā° (c) 45Ā° (d) 180Ā°
When a horse pulls a wagon, the force that causes the horse to move forward is the force (a) The ground exerts on it (b) It exerts on the ground (c) The wagon exerts on it (d) It exerts on the wagon
A horizontal spring is attached to a wall over a horizontal frictionless surface. A 0.53 kg mass is attached to the spring, and a horizontal force of 96 N is applied to stretch the spring. This force is able to stretch it 2.4 cm. (a) Draw a free body diagram before the mass is released. (b)ā¦
Convert 500metre to nanometre
What is the electrostatic potential ?
A progressive wave has a wavelength of 50cm. Calculate the phase difference between two points at a distance of 20cm apart.
The spherical balloon filled with helium at 1 atm just lift a 2kg load whatās its radius?
You and your friend have decided to take advantage of a late winter snowfall by taking a toboggan out to the Sugar Bowl. Letās assume that the combined mass of the toboggan and its riders is 130 kg and the slope is angled upwards at 20.0Ā° above the horizontal. a) Find the magnitude of theā¦
The focal length of a converging lens in air is +145.8 cm. The radii of curvature of the surfaces comprising the lens are R1= 35.7 cm and R2= 60.0 cm, both having their center of curvatures on the back side of the lens. What is the index of refraction of the material composing the lens?
If the lateral magnification of an object is 1.48 and the focal length of the converging lens is 15.3 cm, what is the image distance?
The focal points of a diverging lens are 19.1 cm from the lens. An object is placed 46.3 cm in front of the lens. What is the magnification of the image produced?
An object is initially at rest, 100 cm from a converging lens with a focal length of 30.0 cm. The object accelerates toward the lens at a constant rate of 0.300 cm/s2. At what time will the magnification of the image produced be -2.00?
Two converging lenses having focal lengths of 15.0 cm are placed 25.0 cm apart. Where is the final image located, measured from the 1st lens, if the object is placed 50.0 cm in front of it?
A lamp consumes 500 J of electrical energy in 20 sec. What is the power of the lamp? Answer
List the 7 fundamental physical quantities
Forces acting on sailboat are 390 N north and 180 N East. If the boat had a mass of 270 kg, what are the magnitude and directions of the boats acceleration?
An electric motor rotating a grinding wheel at a rate of 1.41 x 10 (exponent 2) rev/min is turned off. Assume that the wheel has a constant negative angular acceleration of magnitude 1.60 rad/s2. (a) How long (in sec) does it take for the grinding wheel to stop? (b) Through how many radiansā¦
Water striders are insects that propel themselves on the surface of ponds by creating vortices in the water shed by their driving legs. The velocity-versus-time graph of a 29-mm-long water strider that moved in a straight line was created from a video. The insect started from rest, sped up byā¦
Estimate the maximum speed, maximum acceleration, and total displacement of the water strider shown in the figure below.
Estimate the maximum speed, maximum acceleration, and total displacement of the water strider.
How fast would a 1-gram bug need to fly (in m/s) to have the same momentum as a 1,000 kg vehicle traveling 8 m/s?
An 800 kg car traveling 5 m/s rear ends a stationary 1100 kg car. Assuming the ground friction is negligible during this inelastic collision, what is the velocity of the cars just after the collision?
An apple falls from a tree and feels no air resistance. Which of the following statements is true? a. Its momentum is conserved. b,. It accelerates with gravity. c. Its momentum is conserved and it accelerates with gravity. d. It falls with a constant speed and its momentum is conserved.
How fast would a 1-gram bug need to fly (in m/s) to have the same momentum as a 1,000 kg vehicle traveling 8 m/s?
Ic next (WO Questions PII the Same Descnbed Back the Origin It is Made of {J1 Insulating Wancrualed Cases. A solid sphere of radius a is centered with shape = 1: Its surrounded by a hollow concentric uniform charge density shell of inner radius b and outer radius c. The shell has a total chargeā¦
The text below contains several errors in spelling, typographical, grammatical, OCR (optical character recognition), and mathematical aspects. Additionally, there are errors related to the square root symbol. Please review the corrected text for proper formatting and clarity. Text: Theā¦
The following three charges (Q1, Q2, and Q3) are arranged on the x-axis as shown in the figure. Q1 is located at the origin (0,0) and Q2 is located at (0,-4). Find the energy stored in the charge configuration of Q1, Q2, and Q3, and the work that is required to assemble the three charges. Theā¦
U-shaped wire has a metal bar sliding across at 10 meters per second. The bar has a width of 0.3 meters. The apparatus is placed in a 3 Tesla magnetic field that is directed into the paper. What is the magnitude of the induced emf? What is the direction of the induced current? Io * Is
15 years ago, a small film called "The Matrix" introduced a new concept to moviegoers. It was a mind-bending experience that left audiences questioning reality. In Texas, a man named Neo is living a double life. During the day, he is a computer programmer, but at night, he becomes a hacker. Oneā¦
The power transmitted by any harmonic wave varies directly as the square of the amplitude and the square root of the frequency. None of these is correct.
Of students performing an experiment in a diffraction lab using a light source on a screen. The distance between the screen and the light source is (2.212+0.05)m. Determine the initial position of the light sensor and measure the diffraction pattern of the slit for this experiment (withā¦
Maximum emf of an ac generator is 19. An ac generator operates at a rotational frequency of 60 Hz and produces a maximum emf of 100 V. Assume that its output at t=0 is zero. What is the instantaneous emf (a) at t=1/240 s? (b) at t=1/120 s? (c) at t? (d) How much time elapses between successiveā¦
An AWG # 12 copper wire conductor has an 80.8 mil diameter. A 50-foot length carries a current of 20 Amperes Find a) the current density J flowing through the wire, b) the electric field intensity E within the wire, c) the voltage drop across the conductor, and d) the resistance R ofthe 50-footā¦
Involves nonzero amount of work? Was Professor943g Farson took demonstration against wall 12. The amount of work done Horace Newton '88877g and 80 degrees along same displacement Joules EJ Joules {@= JDulgs 13. State the Work Energy Principle' 14. If a particular force does work on an object,ā¦
An object has an initial velocity of 8.245 m/s. The initial velocity of the center of mass is 3.8 m/s. The object has a mass of 40 kg. The initial momentum of the object is 9686 kgĆĀ·m/s. The initial kinetic energy of the object is 53.38 kJ.
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Need Help? LpJ> S-PSEQ 32P 044 Duttery resistor and inductor response. I calculate the following: The power being supplied to the inductor. The power being delivered to the resistor. The energy stored in the magnetic field of the inductor. Need Help?
Martian and Venutian Barometer Mercury (Pue 136kg/mĆĀ³ = aromatic work by atmospheric pressure supporting a vertical column of liquid mercury in a sealed glass tube with no air. The formula pgh Patm uses the height of the column to calculate atmospheric pressure. Find the height of the column onā¦
Each cell (battery) and resistor shown below is a part of an electrical circuit. At which point (A or B) is the electronic potential higher? Find the following voltages: (a) AVAB (b) AVM (c) R-1 (d) Ć¢āĀ¬eSv At which point (A or B) is the electricā¦
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Question 9: Which of the following is arranged in order of increasing wavelength? infrared; visible; ultraviolet; X-rays Question 10: What is the speed of light in a vacuum? 0.86
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Text: (334.3/41 capacitor and (15.010.15)9 An alternating RC circuit constructed with a voltage source that has frequency resistance connected in series with the supplied EMF and the current 100 Hz. Determine phase angle between the circuit and the amplitude of the voltage drop across theā¦
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Problem 14.13 A mass attached to a horizontal spring oscillates at a frequency of 5.50 Hz. The mass is located at x = 6.60 cm and has a displacement of 16.0 cm. Determine...
A 100 W light bulb has about 1.44 ampere resistance. How many bulbs would have to be added in series to blow the fuse? Please explain your reasoning.
Two plane mirrors make the angle of 38.0ĆĀ° between them. A ray of light incident on one of the mirrors is reflected and hits the second mirror. Find the angle between the ray incident on the first mirror and the ray reflected off the second mirror.
A wheel with a diameter of 2.05 m lies in a vertical plane and rotates about its central axis with a constant angular acceleration of 4.40 rad/s^2. The wheel starts at rest at time t, and at this time, the radius vector of a certain point on the rim makes an angle of 57.30ĆĀ° with theā¦
d1 = 100m d3 = S0m To get a for d3 formula: ~Vo + a ~20 a(5) divide 5 by both sides to get a alone a = -Amls^2 100m + 400m + S0m = 550m / 35s = 15.7mls 46) An attacker at the base of a castle wall 3.65m high throws a rock straight up with speed Z 40m/s from a height of 155m above the ground.ā¦
(Spts) The frequency of a 2V peak-to-peak symmetrical square wave signal applied to an amplifier becomes essentially triangular, with amplitude of nearly 1V and frequency of 500 Hz. What is the slew rate of this 2V peak-to-peak input amplifier?
Question 3: (5 points) The circuit shown in the figure below - when the capacitor is fully charged, what is the magnitude of the charge on the plates? 2.0 V = 12 V R = 4.0 ĆĀ© C = 9.0 ĆĀ¼F
As shown in the figure, two blocks of unequal mass are connected by an ideal string over a massless, frictionless pulley. If the blocks move at constant speed (consider both moving up and down the incline) and given that the coefficient of kinetic friction between the Zm block and the inclineā¦
Study Problems: Module Four - Conservation of Momentum (Chapter 9) A cannon and a supply of cannonballs are inside a sealed railroad car, as shown in the diagram below. The cannon fires to the right, causing the car to recoil to the left. The cannonballs remain in the car after hitting the farā¦
The current of 1.8 A flows through a wire. The figure below shows a magnetic field of 12 T. Find the total force on the wire and show that it is the same as if the wire were straight instead of bent at a 3 cm segment.
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cylindrical capacitor consists of solid inner conducting core with radius 0.270 cm surrounded by an outer hollow conducting tube_ The two conductors are separated by air and the ength of the cylinder is 13.5 cm The capacitance is 36.5 pF
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An escalator joins one floor with another one 25 ft above. The escalator is 40 ft long and moves along its length at 2.0 ft/sec. (a) What power must its motor deliver if it is required to carry a maximum of 100 persons per minute, of average mass m=5.0 slugs? (b) A W=160-lb man walks up theā¦
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Determine the moment of the force about the point. Express the result as a Cartesian vector. F = |-61+4j+8k| kN 2 m^2
Consider a RC circuit shown in the figure below, for which R = 10ĆĀ© and C = 4ĆĀ¼F. Find the time constant Ćā of the circuit. What is the maximum charge on the capacitor when the switch is closed? Calculate the current flowing through the circuit at t = 5ms after the switch is closed.
Two men exert forces of F = 80 lb and P = 50 lb on the ropes. Determine the moment of each force about A. Which way will the pole rotate, clockwise or counterclockwise?
An athlete jumps off the ground with a speed of 4.0 m/s. If he rebounds off the floor with a speed of 0.0 m/s, calculate the initial kinetic energy of the athlete before the collision. Calculate the total kinetic energy after the collision. What happens next? Please explain.
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Determine the components of the support reactions at the fixed support A on the cantilevered beam; L = 5 m 4 L = 5 m I = 1.5 m (Q)
The towline exerts a force of P = 6 kN at the end of the 8-m-long crane boom. If Īø = 30Ā°, determine the placement x of the hook at B so that this force creates a maximum moment about point O. What is this moment?
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Using the same system as W34, five charges = 1 HH aMC 45 uie 1 correction of the electric field. 4 charges are placed on a regular pentagon located at the origin of an X-Y coordinate system. The separation between each charge is 1.3 units. If two charges are placed 1.3 units apart from eachā¦
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York College Physics The City University of New York Experiment No. Pre-Lab Questionnaire Data were obtained using a machine called an excimer. The following distances were recorded: 0.20 0.10 535 0.539 932 Explain the third reading. Should it be discarded or repeated? It may be a measurementā¦
The vector position of a particle moving in the XY plane varies in time according to r = (31 + 3j)t + 2j12, where t is in seconds and r is in centimeters. At the same time, the vector position of another particle varies as r2 = 31t^2 + 6jt. (a) Determine the vector position of the center ofā¦
A string that is 0.26 m long is vibrating in its "nth harmonic. The sound from this string resonates with a pipe that is 0.881 m long and open at both ends. What is the common resonant frequency of the string and the pipe? The speed of sound in air is 340 m/s.
I wave interference motion. Solve MOH 1 H dotitake between different 179e | 0? direction periodically in D) 1.54 of the sound intensity.
Figure: The spacing between the surfaces of two parallel metal plates is changed while the voltage between the plates is measured.
A ball is thrown straight up with enough speed s0 that it is in the air for several seconds. Assume the positive direction is upwards. What is the velocity of the ball when it reaches the highest point? Express your answer to two significant figures and include the appropriateā¦
It is important to note that inertia relates to the weight of an object. The concept of inertia is closely related to the motion of an object. The mass of an object affects its inertia. The more mass an object has, the greater its inertia. Inertia is a property of matter that resists changes inā¦
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Calculate New York's 300-foot high Civicaton Tower oscillates in the wind with a period of 6.80 seconds.
Calculations: How many oscillations? Counting 76 heartbeats in 5 seconds. What is the period and the frequency?
The curve to the right shows the radioactive decay of a particular sample of a nucleus called Element A. If a particular nucleus survives for the first 5 hours, what is the probability that the particular nucleus of Element A will decay between 5 hours and 10 hours? What is the probability thatā¦
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Charges placed on a spherical ball with side 2a shown. Find electric field and potential at a point in the center of GCUA TC. Figure A uniformly charged spherical ball with radius and volume charge density placed in an infinite linear dielectric medium with dielectric constant. Find electricā¦
point) 5 9 For the circuit shown in the figure above; Find the current in the three branches_ What is the potential VA VB Assume Vi = 15 V, Vz 10 V and Vs 12V
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Previous Problem List Next point) car battery has terminal potential difference of 13.4 V when there is no load When the starter motor draws 75 A, the terminal potential difference drops to 10.4 v. What is the internal resistance of the battery?
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For the circuit shown in the figure above, find the current in each resistor. Assume V = 6V and Vz = 4V. 4-ohm resistor: 2-ohm resistor: 3-ohm resistor: Note: You can earn partial credit on this problem.
The space station shown below contains all the appropriate space such as astronaut standing on the outer wall (where shown) has tangential speed and experiences centripetal acceleration of 9.8 m/sĆĀ². Astronaut Christina Koch rides a bicycle = QW[cwall that her total tangential speed is 21, andā¦
Electric flux (For reference) NĆĀ·m^2/C passes through a flat horizontal surface that has an area. The flux equation is on page 637 of the 8th edition of "Principles of Physics" by Serway and Jewett. The uniform electric field points 156 above horizontally. Find the magnitude of the electricā¦
Iodine We point) An ideal battery connected to an external resistor. When 50 ĆĀ© is added, the current drops from 9.6 A to 6.2 A. Find the value of the resistor and the emf of the battery. emf Note: You can earn partial credit on this problem.
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Lab: Charged Particle in a Magnetic Field Conservation of Energy and Uniform Circular Motion Vector Product and Archimedes' Rule: c = i * B Magnetic Field (B) experienced by a moving charged particle: R = q * v * B Our experiment involves a charged particle experiencing a magnetic field atā¦
On top of the King City High School building, near the top, the elevator begins to slow down. Which diagram below best represents the directions and magnitudes of the forces on Tom?
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The analog clock moves. The "second hand" makes a revolution every minute. If the length of the second hand from the rotation point to its tip is 6.7 cm, how far does the tip of the second hand travel in one day? 491 m, 9.0448 m, 9.648 m, 606 m, 1.536 m
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The velocity components of a moving object in the y-plane change as follows: 50 m/s, 3.0 m/s^2, 5.0 m/s^2, and 7.0 m/s^2 in 3.0 seconds. (a) What is the work done on the body? (b) What is the average power delivered to the body? An escalator connects one floor with another above. The escalatorā¦
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Problem 7.19 Part A The figure (Figure 1) shows two strong magnets on opposite sides of a small table. The long-range attractive force between the magnets keeps the lower magnet in place. Draw a free-body diagram for the upper magnet. Draw the vectors starting at the black dot. The locationā¦
So here is the text: Ind % in &t0 Each of the steps shown below indicate the net charge. How does the charge electrostatic equilibrium has been reached? Can the CHA charged sphere? Charge on 1r- unchanged until a small charge is brought near it Charge on Y: third ballā¦
More Friction Problems 1. A 60.0 N force is applied at an angle of Īø = 35.0Āŗ to a 8.00 kg block pressed against a rough vertical wall and the block slides down the wall at constant velocity. Calculate the coefficient of kinetic friction between the block and the wall. a. Draw a FBD of theā¦
A block with unknown mass M is placed on a frictionless inclined plane with a slope angle of 30.0ĆĀ° and connected to a second hanging block with a mass of 3.35 kg by an ideal string and a small, frictionless pulley as shown in the figure on the chalkboard. The blocks, once released, remainā¦
Four capacitors are connected. (GAF #f H/-B Acsf 2JlF Calculate the charge on each capacitor, taking Av as the voltage.
small cube of mass m slides down circular path of radius R cut into large block of mass M_ The block of mass MM rests on table; and both the cube and the block move without friction and are initially at rest. The cube of mass m starts from the top of the path_ Find the velocity of the cubeā¦
Problem: Charge +4 C is fixed at the origin, while charge -3 C is on the Y-axis, 3 m as shown. What is the resultant electric potential V at the point axis - m from the origin (taking V = 0 at infinity)?
Text: Force Problems For each problem, make sure to draw a clear Free Body Diagram (FBD) solution. Show all relevant forces, including tension, normal force, and weight. Problem 1: A force of 24 kN is applied to pull a 10 kg block across the floor with an acceleration of 9 m/s^2. What is theā¦
Verical and horizontal lines. Point Cm from the origin (the crossing of all the charges are 15 force charge of +0 calculate magnitude of the +3.0 AC, then the above figure placed the origin.
The corrected text is as follows: "The dry density (Pa) and wet density (p) of the soil were found to be 2.70. To calculate W, Pa (the dry density), and p (the wet density) of the soil, derive the equation for p' (the submerged density) in terms of n, Ć¢āĀ¬C, and Pa. Derive the formula in twoā¦
Texts: y (m) ~3 nC 5 nC ~1 72 33 ~4 ~5 ~5 55 nC ~3 - 0 1 2 3 4 5 What is the magnitude of the resulting force on the 5 nC charge at the origin? The value of the Coulomb constant is 8.98755 x 10^9 NĆĀ·m^2/C^2. Answer in units of N.
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Today's speed is higher than yesterday's speed. Explain the concept of density. Every day, the speed of an individual increases. What does the symbol "Ph" stand for? Explain the concept of velocity. Draw a diagram to represent the velocity of an object moving in a straight line. The formula forā¦
Q3. A single capacitor of capacitance C1 is connected to a battery. Then a second capacitor of capacitance C2 is added in parallel with C1. Carefully explain all your answers to the following questions: (i) Does the potential difference across C1 increase, decrease, or stay the same compared toā¦
For the circuit to the right; consisting of three ideal batteries and three ideal resistors, calculate the current through point P. Let the sign of the current correspond to its direction, with "up" being positive. Given: V1 = 29.5 V, V2 = -15.0 V, V3 = 27.0 V; R1 = 1.30 kĆĀ©, R2 = 14.0 kĆĀ©, R3ā¦
A 2 MHz linearly-polarized wave with an electric field modulus of 10 V/m is traveling in a dielectric medium with ĆĀµr = 4 in the positive y-direction. Write an expression for the phasor and instantaneous forms of the electric and magnetic fields, given that the field is at a positive maximum atā¦
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During this time, we will deliberate through the topic of violent lightning bolts. Specifically, we will examine the amount of charge delivered by a lightning bolt. The lightning bolt is connected to a battery charger, which delivers a voltage of 12V. We want to determine the amount of energyā¦
Battery 6. In the circuit given below, the capacitance between points charge stored in C2 (C). What
An object with a mass M = 250 g is at rest on a plane that makes an angle 0 = 30" above the horizontal: The coefficient of kinetic friction between M and the plane is Hk = 0.100. Mass M is attached by a string to another mass, m = 200 g, which hangs freely: When mass m has fallen 30.0 cm, itsā¦
2b Or Figure 16.37. Exercises 16-1, 16-2, 16-3, 16-13, 16-14, and 16-17.
12.4 ĆĀ© resistor; inductor 300 mH and 0.00 ĆĀ¼F capacitor connected in series to an alternating current having an amplitude = 10.0 V and angular frequency of 300 rad/s. Find the circuit impedance, the VR, VL, VC values, the phase angle, and the RMS current.
Machine NASA 760 E steel chute is pulled square 2/64 classic released when the elastic cord has 1J0 kinetic force. What is the acceleration of the chute? All head Plkiocfeehes directive Elastic cord Pin A
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The helicopter P1,67 shown two people pulling a stubborn mule. The person on the right pulls with an inner magnitude of [ZON and direction 6jO.o? - The person on the left pulls with force F, magnitude 80.0N and direction of 62 7509. Find the single force that is equivalent to the two forces.ā¦
(12 CH 7) What is the tension in the rope in the figure below (neglect the inertia of the pulley and the mass of the rope)? Lea! + 1OO ke
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Notes Evaluate Feedlnar nat Equipotential lines/surfaces Select all that are true: - are perpendicular to the electric field. - are closer together where the electric field is stronger. - are lines/surfaces that change potential as you move along the line/surface (but stay on the same one). -ā¦
At what distance would the Sun have t0 be in order to have the same A parent magnitude as 100 W light bulb found at 100 m away? Express your answer in Ly
Problem 2 The hockey puck has a diameter of 7.6 cm, a thickness of 2.54 cm, and a mass of 170 grams. During motion, the air film under the puck can be estimated to be about 1 mm thick. Calculate the time required after impact for the puck to lose 10 percent of its initial speed. Problem ? Theā¦
In Capstone, you might acquire position vs. time data for your simple harmonic oscillator that look like the example below: How could you measure the period of oscillation directly from the sinusoidal graph? A sine function has also been fit to these data, with parameters in the white box. Inā¦
Given that a positive point charge of 31nC (31*10^9) is surrounded by an equipotential surface with a radius of rA = 0.24m. A positive test charge of 67pC (0.67*10^-12C) moves from surface A to another equipotential surface B, which has a radius of rB. The work done by the mover as the testā¦
Two Women Your consulting agency, with its extensive knowledge of physics, has been subpoenaed to provide expert testimony in an automobile accident case in civil court. The case involves a crash between a Ford Escort car and a tractor-trailer truck. The police department determined that theā¦
Solve the following problem: The launching mechanism of a toy gun consists of a spring as shown in the figure. To load the gun, you have to compress the spring a distance of x = 0.12 m by applying a force F = 6 N. Then the gun is fired vertically as shown, launching a 20.0 g projectile fromā¦
A steel beam is under a compressive load that causes a strain of 0.01. Find the stress on the beam.
A dog chasing a ball starts at rest and accelerates uniformly over a distance of 5 meters. It takes the dog 1 s to cover that first 5 m. What is the dogās acceleration, and what speed is the dog travelling when it reaches the 5 m point?
During a particular car crash, it takes just 0.18 s for the car to come to a complete stop from 50 km h?1 . (a) At what rate is the car accelerating during the crash? (b) How many times larger than the acceleration due to gravity is this?
An aluminum wing on a passenger jet is 31 m long when its temperature is 28Ā°C. At what temperature would the wing be 8 cm (0.08 m) shorter?
A machinist wishes to insert a copper rod with a diameter of 7 mm into a hole with a diameter of 6.991 mm. By how much would the machinist have to lower the temperature (in Ā°C) of the rod to make it fit the hole?
During a particular car crash, it takes just 0.18 s for the car to come to a complete stop from 50 km h?1 . (a) At what rate is the car accelerating during the crash? (b) How many times larger than the acceleration due to gravity is this?
A bullet mass 10 gm is fired from a gun of mass 1kg. If the recoil velocity is 5 m/s, the velocity of the muzzle is
Two forces of magnitude F have a resultant of the same magnitude F. The angle between the two forces is
An object is subjected to a force in the north-east direction. To balance this force, a second force should be applied in the direction (a) North-East (b) South (c) South-West (d) West
If two forces of 5 N each are acting along X and Y axes, then the magnitude and direction of resultant is
The resultant force of 5 N and 10 N can not be (a) 12 N (b) 8 N (c) 4 N (d) 5 N
bullet of mass 5 g is shot from a gun of mass 5 kg. The muzzle velocity of the bullet is 500 m/s. The recoil velocity of the gun is (a) 0.5 m/s (b) 0.25 m/s (c) 1 m/s (d) Data is insufficient
bullet of mass 0.1 kg is fired with a speed of 100 m/sec, the mass of gun is 50 kg. The velocity of recoil is
The momentum of a system is conserved [CPMT 1982] (a) Always (b) Never (c) In the absence of an external force on the system (d) None of the above
body of mass 0.25 kg is projected with muzzle velocity 1 100 ? ms from a tank of mass 100 kg. What is the recoil velocity of the tank (a) 1 5 ? ms (b) 1 25 ? ms (c) 1 0.5 ? ms (d) 1 0.25 ? ms
force of 50 dynes is acted on a body of mass 5 g which is at rest for an interval of 3 seconds, then impulse is
A dog chasing a ball starts at rest and accelerates uniformly over a distance of 5 meters. It takes the dog 1 s to cover that first 5 m. What is the dogās acceleration, and what speed is the dog travelling when it reaches the 5 m point?
Rocket engines lift a rocket from the earth surface because hot gas with high velocity [AIIMS 1998; JIPMER 2001, 02] (a) Push against the earth (b) Push against the air (c) React against the rocket and push it up (d) Heat up the air which lifts the rocket
Rocket engines lift a rocket from the earth surface because hot gas with high velocity (a) Push against the earth (b) Push against the air (c) React against the rocket and push it up (d) Heat up the air which lifts the rocket
rocket of mass 1000 kg exhausts gases at a rate of 4 kg/sec with a velocity 3000 m/s. The thrust developed on the rocket is (a) 12000 N (b) 120 N (c) 800 N (d) 200 N
A rope of length 5m is kept on frictionless surface and a force of 5N is applied to one of its end. Find tension in the rope at 1m from this end [RPET 2000] (a) 1 N (b) 3 N (c) 4 N (d) 5 N
The motion of a rocket is based on the principle of conservation of [AFMC 2000] (a) Mass (b) Kinetic energy (c) Linear momentum (d) Angular momentum
When the speed of a moving body is doubled [UPSEAT 2004] (a) Its acceleration is doubled (b) Its momentum is doubled (c) Its kinetic energy is doubled (d) Its potential energy is doubled
A wagon weighing 1000 kg is moving with a velocity 50km/h on smooth horizontal rails. A mass of 250 kg is dropped into it. The velocity with which it moves now is (a) 2.5 km/hour (b) 20 km/hour (c) 40 km/hour (d) 50 km/hour
If a force of 250 N act on body, the momentum acquired is 125 kgm/ s. What is the period for which force acts on the body (a) 0.5 sec (b) 0.2 sec (c) 0.4 sec (d) 0.25 sec
A body, whose momentum is constant, must have constant [AIIMS 2000] (a) Force (b) Velocity (c) Acceleration (d) All of these
A force of 100 dynes acts on a mass of 5 gram for 10 sec. The velocity produced is (a) 2000 cm / sec (b) 200 cm / sec (c) 20 cm / sec (d) 2 cm / sec
A ball of mass m moves with speed v and it strikes normally with a wall and reflected back normally, if its time of contact with wall is t then find force exerted by ball on wall
ball of mass 0.5 kg moving with a velocity of 2 m/sec strikes a wall normally and bounces back with the same speed. If the time of contact between the ball and the wall is one millisecond, the average force exerted by the wall on the ball is
gun of mass 10kg fires 4 bullets per second. The mass of each bullet is 20 g and the velocity of the bullet when it leaves the gun is 300 msā»Ā¹. The force required to hold the gun while firing is
The time in which a force of 2 N produces a change of momentum of 10.4 kg ms in the body is
small balls each of mass m impinge elastically each second on a surface with velocity u. The force experienced by the surface will be
10,000 small balls, each weighing 1 gm, strike one square cm of area per second with a velocity 100 m/s in a normal direction and rebound with the same velocity. The value of pressure on the surface will be
A man is at rest in the middle of a pond on perfectly smooth ice. He can get himself to the shore by making use of Newton's (a) First law (b) Second law (c) Third law (d) All the laws
A cannon after firing recoils due to [EAMCET 1980] (a) Conservation of energy (b) Backward thrust of gases produced (c) Newton's third law of motion
Swimming is possible on account of [AFMC 1998, 2003] (a) First law of motion (b) Second law of motion (c) Third law of motion (d) Newton's law of gravitation
When we jump out of a boat standing in water it moves (a) Forward (b) Backward (c) Sideways (d) None of the above
A man is standing at a spring platform. Reading of spring balance is 60 kg wt. If man jumps outside platform, then reading of spring balance [AFMC 1996; AIIMS 2000; Pb. PET 2000] (a) First increases then decreases to zero (b) Decreases (c) Increases (d) Remains same
Newton's third law of motion leads to the law of conservation of (a) Angular momentum (b) Energy (c) Mass (d) Momentum
A man is carrying a block of a certain substance (of density 1000 ?3 kgm ) weighing 1 kg in his left hand and a bucket filled with water and weighing 10 kg in his right hand. He drops the block into the bucket. How much load does he carry in his right hand now (a) 9 kg (b) 10 kg (c) 11 kgā¦
A man is standing on a balance and his weight is measured. If he takes a step in the left side, then weight [AFMC 1996] (a) Will decrease (b) Will increase (c) Remains same (d) First decreases then increases
Action and reaction forces act on (a) The same body (b) The different bodies (c) The horizontal surface (d) Nothing can be said
A machine gun fires 20 bullets per second into a target. Each bullet weighs 150 gms and has a speed of 800 m/sec. Find the force necessary to hold the gun in position [EAMCET 1994] (a) 800 N (b) 1000 N (c) 1200 N (d) 2400 N
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A student attempts to pull himself up by tugging on his hair. He will not succeed (a) As the force exerted is small (b) The frictional force while gripping, is small. (c) Newton's law of inertia is not applicable to living beings. (d) As the force applied is internal to the system.
book is lying on the table. What is the angle between the action of the book on the table and the reaction of the table on the book [Kerala PMT 2005] (a) 0Ā° (b) 30Ā° (c) 45Ā° (d) 180Ā°
When a horse pulls a wagon, the force that causes the horse to move forward is the force (a) The ground exerts on it (b) It exerts on the ground (c) The wagon exerts on it (d) It exerts on the wagon
A horizontal spring is attached to a wall over a horizontal frictionless surface. A 0.53 kg mass is attached to the spring, and a horizontal force of 96 N is applied to stretch the spring. This force is able to stretch it 2.4 cm. (a) Draw a free body diagram before the mass is released. (b)ā¦
Convert 500metre to nanometre
What is the electrostatic potential ?
A progressive wave has a wavelength of 50cm. Calculate the phase difference between two points at a distance of 20cm apart.
The spherical balloon filled with helium at 1 atm just lift a 2kg load whatās its radius?
You and your friend have decided to take advantage of a late winter snowfall by taking a toboggan out to the Sugar Bowl. Letās assume that the combined mass of the toboggan and its riders is 130 kg and the slope is angled upwards at 20.0Ā° above the horizontal. a) Find the magnitude of theā¦
The focal length of a converging lens in air is +145.8 cm. The radii of curvature of the surfaces comprising the lens are R1= 35.7 cm and R2= 60.0 cm, both having their center of curvatures on the back side of the lens. What is the index of refraction of the material composing the lens?
If the lateral magnification of an object is 1.48 and the focal length of the converging lens is 15.3 cm, what is the image distance?
The focal points of a diverging lens are 19.1 cm from the lens. An object is placed 46.3 cm in front of the lens. What is the magnification of the image produced?
An object is initially at rest, 100 cm from a converging lens with a focal length of 30.0 cm. The object accelerates toward the lens at a constant rate of 0.300 cm/s2. At what time will the magnification of the image produced be -2.00?
Two converging lenses having focal lengths of 15.0 cm are placed 25.0 cm apart. Where is the final image located, measured from the 1st lens, if the object is placed 50.0 cm in front of it?
A lamp consumes 500 J of electrical energy in 20 sec. What is the power of the lamp? Answer
List the 7 fundamental physical quantities
Forces acting on sailboat are 390 N north and 180 N East. If the boat had a mass of 270 kg, what are the magnitude and directions of the boats acceleration?
An electric motor rotating a grinding wheel at a rate of 1.41 x 10 (exponent 2) rev/min is turned off. Assume that the wheel has a constant negative angular acceleration of magnitude 1.60 rad/s2. (a) How long (in sec) does it take for the grinding wheel to stop? (b) Through how many radiansā¦
Water striders are insects that propel themselves on the surface of ponds by creating vortices in the water shed by their driving legs. The velocity-versus-time graph of a 29-mm-long water strider that moved in a straight line was created from a video. The insect started from rest, sped up byā¦
Estimate the maximum speed, maximum acceleration, and total displacement of the water strider shown in the figure below.
Estimate the maximum speed, maximum acceleration, and total displacement of the water strider.
How fast would a 1-gram bug need to fly (in m/s) to have the same momentum as a 1,000 kg vehicle traveling 8 m/s?
An 800 kg car traveling 5 m/s rear ends a stationary 1100 kg car. Assuming the ground friction is negligible during this inelastic collision, what is the velocity of the cars just after the collision?
An apple falls from a tree and feels no air resistance. Which of the following statements is true? a. Its momentum is conserved. b,. It accelerates with gravity. c. Its momentum is conserved and it accelerates with gravity. d. It falls with a constant speed and its momentum is conserved.
How fast would a 1-gram bug need to fly (in m/s) to have the same momentum as a 1,000 kg vehicle traveling 8 m/s?
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