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Physics 101 Mechanics Q&A Archive of May 31, 2023

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May 31 of 2023

The ball-launching spring in a pinball machine has a force constant k = 243 N/m. The spring is compressed 6 cm before launch. Due to the slant of the machine, the 80 g ball rises 12.5 cm vertically as it approaches the back of the machine. a. What is the speed of the ball immediately after…
A sphere is hanging freely in a card for what?
The Time intervals between flashes on a strob lights is 1/80th of a seconds .What is the frequency of these flashes
A roller coaster designer wants to know what the speed of the cars will be at each point on the ride so that structural supports can be constructed accordingly. The initial height is h = 126 m above ground, point A is 37.8 m above ground, and point D is at ground level. Find the velocity at the…
6. Amass of \( 2 \mathrm{~kg} \) is suspended by \( 1 \mathrm{~m} \) long string and is set free at point \( \mathrm{A} \) as shown. Neglecting air resistance, what is the speed of the mass as it passes through point \( B \)
Assignment for General physics 2023 1. A \( 5 \mathrm{~kg} \) mass attached to a spring performs a SHM of amplitude \( 50 \mathrm{~cm} \).If the maximum force exerted on the body is \( 100 \mathrm{~N} \), what is the acceleration at a distance of \( 40 \mathrm{~cm} \) from the equilibrium…
You are sitting in a car when you notice the truck beside you appear to be moving away. A person on the sidewalk observes your car moving away from truck. Which statement best describes why a frame of reference is important when describing motion?
Down ward forces of 45N and 15N respectively are required to keep a plastic block totally immersed in water and oil. If the volume of the block is 8000cm3 the density of the oil is?
A certain cell needs to spend 0.22 nW of power to swim at a constant speed of 0.42mm/s. What is the magnitude of the drag force opposing its motion?
A 3.0 kg mass attached to a spring of spring constant 12 N/m is at rest when the spring is stretched by 2.2 cm. What is its speed when the spring is stretched by 1.8 cm?
A 0.68 kg mass starts from rest. After falling 30 m straight down, its speed is 20 m/s. Only gravity and drag act on the mass during the fall. How much work was done by drag during the fall?
A force F =(12,-8.0) N acts on a mass across a displacement of d =(6.2, 4.3) m. What is the work done on the mass by the force?
The supermassive black hole in the core of the Milky Way has a mass of about 8.3 x 10 36 kg. It is about 2.5 x 10^20 away. What is the magnitude of the gravitational force that it exerts on a human of mass 63 kg? G = 6.67 x 10^- 11 m^3 / kg-s^2. Note that although Newtonian gravity fails close…
At the time of the of life on Earth. The moon was only about half as far from the Earth as it is today. How long did it take the Moon to the during the time of the origin of life in units of the modern time Tm?
The lethal acceleration for most humans is about 6g = 59 m/s^2. At what speed would a roller coaster traveling in a horizontal loop of radius 4.9 m reach this acceleration?
ATP synthase is the protein embedded in mitochondrial membranes that is responsible for producing ATP. As part of its function, it spins at about 2100 rad/s. It produces 3 ATP per complete rotation. How long does it take a single ATP synthase to rotate once and, thus, produce 3 ATP?
A mass m1 = 20 kg is on a ramp with angle θ = π/6 rad. It is attached to another mass m2, which is hanging vertically, with an unbreakable rope. Connected to m1 is a red cord, which can provide a maximum tension force of Tmax = 3000 N. a. What is the maximum value of m2 so that both…
A turning fork vibrating at 512 Hz from rest and accelerates 9.80 m/s squared . how far below the point of release is the turning fork when waves of frequency 485 Hz reach the release
consider a diagnostic ultrasound of frequency 5.00 MHz that is used to irregularity in soft tissue .( 1 )what is the wavelength in air of such a sound wave if the speed of sound is 343 m/s . ( 2 ) if the speed of sound tissue is 1800 m/s , what is the wavelength in tissue
11. Determine the equivalent high-frequency input and output RC circuit for following figure and find its upper critical frequency due to input and output \( \mathrm{RC} \) circuit if a transistor with the following specifications is used: \( \beta_{a c}=75, \mathrm{C}_{\mathrm{be}}=15…
consider a diagnostic ultrasound of frequency 5.00 MHz that is used to irregularity in soft tissue . what is the wavelength in air of such a sound wave if the speed sound is 343 m/s
State three (3) differences between tensile strain and tensile stress
the speeds of the ions are 2x10^6 m/s. they can be steered up or down by changing the electric potential between the plates . this causes the ions to undergo a vertical acceleration when they are between the plates. the plates are 10.0 cm long and the distance from the plates to the tumor is…
A man weighs 128 lb on the surface of the earth (radius = 3960 miles). At what distance above the surface of the earth would he weigh 80 lb?
23 [I] A 50.0-liter cylinder is open to the atmosphere. It is then sealed with a piston and compressed down to 10.0 liters. If the temperature is kept constant, what will be the new absolute pressure? [Hint: Use Boyle's Law.]
sec. 12-5 Some Examples -2 An ay smobile with a mass of \( 1360 \mathrm{~kg} \) has \( 3.35 \mathrm{~m} \) between the front and rear axles. Its center of gravity is located \( 1.85 \mathrm{~m} \) behind the front axle. With the automobile on leyel ground, determine the magnitude of the force…
.2 An ay mobile with a mass of \( 1360 \mathrm{~kg} \) has \( 3.35 \mathrm{~m} \) between the front and rear axles. Its center of gravity is located \( 1.85 \mathrm{~m} \) behind the front axle. With the automobile on level ground, determine the magnitude of the force from the ground on (a)…
sec. 12-5 Some Examples of Static Equilibrium -2. An aypmobile with a mass of \( 1360 \mathrm{~kg} \) has \( 3.35 \mathrm{~m} \) between the front and rear axles. Its center of gravity is located \( 1.85 \mathrm{~m} \) behind the front axle. With the automobile on level ground, determine the…
How do I do what #3 is asking?
A narrow slit allows monochromatic light of wavelength to fall on a prism of very small angle as shown in the figure. A screen is placed at a distance from the source to obtain an interference pattern. To determine the distance between the virtual images formed by the prism an…
Soru 3 Use nodal analysis in the circuit of figure below to find \( V_{a} \) and \( V_{b} \). \[ \text { Let } R_{1}=10 \Omega, R_{2}=4 \Omega, R_{3}=6 \Omega, R_{4}=6 \Omega, I_{1}=2 \mathrm{~A}, V_{1}=2 \mathrm{~V}, V_{2}=4 \mathrm{~V} \text {. } \]
A vehicle of mass 2230 kg is moving at a speed of 95 km/h. What magnitude of force is required to stop the vehicle over a distance of 20m?
In the elbow connection shown, the flow rate is \( 0 . \mathrm{m}^{3} / \mathrm{s} \) and the diameters at inlet and exit are \( 10 \mathrm{~cm} \) and \( 5 \mathrm{~cm} \) respectively. The water pressure at inlet and exit is \( 100 \mathrm{kPa} \).
An oscillating beam has one of its extremes pinned to a slider that moves on a horizontal rod. Fill out the velocity and acceleration equations in the next two sheets when assuming that the moving frame is fixed with AB and: AB = 2 m vA = 0.2 i [m/s] = const ωAB = 0.2 k [rad/s] αAB = 1,2…
Consider a cannon that weighs \( 500 \mathrm{Kg} \). It fires cannon at the speed of \( 200 \mathrm{~m} / \mathrm{s} \). The weight of the cannon is \( 2 \mathrm{Kg} \). Find the speed of recoil for the cannon.
4.3. A bullet of mass \( 2.00 \mathrm{~g} \) is moving horizontally with a speed of \( 5.00 \times 10^{2} \mathrm{~m}^{-1} \). The bullet strikes and is embedded in the edge of a solid disk of mass \( 3.20 \mathrm{~kg} \) and a radius of \( 0.500 \mathrm{~m} \). The cylinder is free to rotate…
PHYSICS PHYEIAI EXAMINATION Z02? 43.1. Calculate the angular speed of the bullet disk syatern 4.3.2 (atcolate the knetic energy of the bullet-diak systern 433 then if the kinetre enctgy is conserved in the precests.
where \( S \) is the dis where \( S \) is the distance traveled by the particl (A) \( M^{1} L^{0} \) (B) \( M^{0} L^{0} T^{-2} \) (C) \( M^{0} L^{1} T^{-1} \) (D) \( M^{1} L^{1} T^{0} \) (A) \( (B) L T^{-3}(C) M^{1} L^{1} T^{-2} \) (D) \( L T^{-1} \) gnenthat: \( a-b=2 c, a+b=4 c, c=3 i+4 j \)…
2 1) \( =\min \min \)
2. To a friend living abroad describing natural distan in your locality.
1. An electron in a uniform magnetic flux density \( \vec{B} \) has a velocity \( \vec{v}=4.0 \times 10^{5} \mathrm{~m} / \mathrm{s} \hat{i}+ \) \( 7.1 \times 10^{5} \mathrm{~m} / \mathrm{s} \hat{j} \). If the electron experiences a force of \( \vec{F}=-2.7 \times 10^{-13} \mathrm{~N}…
Leamers will answer Activity 2 Point-to-Point Objective: Calculate the amount of potential and kinetic energy present in each point. Materials: Sketch/pictures Procedure: Fill in the missing kinetic and potential energy values. Remember to apply the LAW OF CONSERVATION OF MECHANICAL ENERGY ( 9…
Calcular la derivada implĂ­cita de las siguientes funciones 1. \( 4 \cos x \cos y=3 \)
Calcular la derivada implĂ­cita de las siguientes funciones 1. \( 4 \cos x \cos y=3 \) 2. \( y=x \ln y+\operatorname{sen} 3 x \) 3. \( 5 x y^{7}-y^{3}=9 x+4 y \)
The three fusion forms in Eq. 15.3 each have different energy outputs. Looking at Figure 15.10 how would you qualitatively describe why the three reactions differ in this way?
Which of the following statements about gravity and gravitational systems are true ? 1. Planets orbiting closer to their host star orbit at a higher speed than planets orbiting farther away from the same star . 2. If the distance between two masses is doubled , then the gravitational…
Aim of the experiment on pendulum
A typical human uses about 2000 kcal/day = 8.4 MJ/day of power. A kilogram of fat contains about 38 MJ of stored chemical energy, which is consumed to provide power when food intake is insufficient to meet the body's power needs. If a human goes on a diet that cuts their food intake to only…
9.6) A FLIWHEEL HAS ANGULAR ACCELERATION \( \alpha_{2}(t)=8.60 R A D / s^{2}-\left(2.30 R A D / \mathrm{s}^{3}\right) \mathrm{t} \), WHERE COUNTER CLOCKWISE ROTATION IS POSITIVE. (a.) IF THE FLYWHEEL IS AT REST AT \( t=0 \), WHAT IS ITS ANGULAR VELOCITY AT (b.) THROUGH WHAT ANGLE DOES THE…
7 : Probes sent to Mercury struggle to slow down enough to enter orbit . How much kinetic energy does a 1000 kg probe gain if it starts near Earth's orbit , Sun , and ends near Mercury's orbit , 1.5 x 10^11 m from the 6.86 x 10^10 m from the Sun? (Neglect any energy changes caused by the Earth…
A 1.2 kg mass is dropped on Earth from the top of a 40 m tall building . The mass starts from rest . When it reaches the ground , it is moving at 9.2 m / s . How much energy did drag dissipate while the mass was falling ? g = 9.8m / (s^2)
If a man can jump 64 cm vertically on the Earth, how high could he jump on Mars , assuming that his jump's energy does not change? Gravity of earth = 9.8 m/s^2; gravity of mars = 3.7 m/s^2
A certain baseball pitcher can throw a baseball at 90 miles-per-hour. Another pitcher is able to throw a base- ball at 99 miles -per-hour What is the ratio of the work that they do on the baseball when pitching , W_{99}/W_{90} (A baseball is at rest before the pitcher throws it.)
When stars like the Sun die, they eject their outer layers and expose their cores. Stars in this state are called white dwarf stars. These dead cores usually have a mass of about 1.2 x 10^30 kg (about 60% of the Sun's mass) with a radius of about 6.4 x 10^6 m (about the same as the Earth's…
A circle is a special case of an ellipse, in which both foci are in the same location. So, it is possible, although unlikely, for a planet to orbit in uniform circular motion with the Sun at the center, and gravity serving as the centripetal force. What velocity would a planet need to have in…
2. A free jet of water with constant cross-section area \( 0.01 \mathrm{~m}^{2} \) is deflected by a hinged plate of length \( 2 \mathrm{~m} \) supported by a spring with spring constant \( k=500 \mathrm{~N} / \mathrm{m} \) and uncom- pressed length \( x_{0}=1 \mathrm{~m} \). What jet speed has…
Two blocks are placed on a frictionless surface. The leftmost block has a mass of 5.00 kg and is pushed such that its velocity is 5 m/s to the right. The second block has mass of 10.0 kg and is initially stationary. If the blocks collide and stick together, what is the final velocity of the…
Two blocks are placed on a frictionless surface. The leftmost block has a mass of 5.00 kg and is pushed such that its velocity is 5.00 m/s to the right. The second block has mass of 10.0 kg and is initially stationary. If the blocks collide and stick together, what is the final velocity of the…
The rectangular cross section shown in Fig. 6-35a is subjected to a bending moment of \( M=12 \mathrm{kN} \cdot \mathrm{m} \). Determine the normal stress developed at each corner of the section, and specify the orientation of the neutral axis. (a)
Western Classical Plays/Opera B. Match column A with column B. Choose your answer in column B that corresponds to the pictures in column A. And write in the last column the period it was created and performed. 261
The ball-launching spring in a pinball machine has a force constant k = 243 N/m. The spring is compressed 6 cm before launch. Due to the slant of the machine, the 80 g ball rises 12.5 cm vertically as it approaches the back of the machine. a. What is the speed of the ball immediately after…
A roller coaster designer wants to know what the speed of the cars will be at each point on the ride so that structural supports can be constructed accordingly. The initial height is h = 126 m above ground, point A is 37.8 m above ground, and point D is at ground level. Find the velocity at the…
You are sitting in a car when you notice the truck beside you appear to be moving away. A person on the sidewalk observes your car moving away from truck. Which statement best describes why a frame of reference is important when describing motion?
A certain cell needs to spend 0.22 nW of power to swim at a constant speed of 0.42mm/s. What is the magnitude of the drag force opposing its motion?
A 3.0 kg mass attached to a spring of spring constant 12 N/m is at rest when the spring is stretched by 2.2 cm. What is its speed when the spring is stretched by 1.8 cm?
A 0.68 kg mass starts from rest. After falling 30 m straight down, its speed is 20 m/s. Only gravity and drag act on the mass during the fall. How much work was done by drag during the fall?
A force F =(12,-8.0) N acts on a mass across a displacement of d =(6.2, 4.3) m. What is the work done on the mass by the force?
The supermassive black hole in the core of the Milky Way has a mass of about 8.3 x 10 36 kg. It is about 2.5 x 10^20 away. What is the magnitude of the gravitational force that it exerts on a human of mass 63 kg? G = 6.67 x 10^- 11 m^3 / kg-s^2. Note that although Newtonian gravity fails close…
At the time of the of life on Earth. The moon was only about half as far from the Earth as it is today. How long did it take the Moon to the during the time of the origin of life in units of the modern time Tm?
The lethal acceleration for most humans is about 6g = 59 m/s^2. At what speed would a roller coaster traveling in a horizontal loop of radius 4.9 m reach this acceleration?
ATP synthase is the protein embedded in mitochondrial membranes that is responsible for producing ATP. As part of its function, it spins at about 2100 rad/s. It produces 3 ATP per complete rotation. How long does it take a single ATP synthase to rotate once and, thus, produce 3 ATP?
A mass m1 = 20 kg is on a ramp with angle θ = π/6 rad. It is attached to another mass m2, which is hanging vertically, with an unbreakable rope. Connected to m1 is a red cord, which can provide a maximum tension force of Tmax = 3000 N. a. What is the maximum value of m2 so that both…
the speeds of the ions are 2x10^6 m/s. they can be steered up or down by changing the electric potential between the plates . this causes the ions to undergo a vertical acceleration when they are between the plates. the plates are 10.0 cm long and the distance from the plates to the tumor is…
How do I do what #3 is asking?
A vehicle of mass 2230 kg is moving at a speed of 95 km/h. What magnitude of force is required to stop the vehicle over a distance of 20m?
Which of the following statements about gravity and gravitational systems are true ? 1. Planets orbiting closer to their host star orbit at a higher speed than planets orbiting farther away from the same star . 2. If the distance between two masses is doubled , then the gravitational…
A typical human uses about 2000 kcal/day = 8.4 MJ/day of power. A kilogram of fat contains about 38 MJ of stored chemical energy, which is consumed to provide power when food intake is insufficient to meet the body's power needs. If a human goes on a diet that cuts their food intake to only…
7 : Probes sent to Mercury struggle to slow down enough to enter orbit . How much kinetic energy does a 1000 kg probe gain if it starts near Earth's orbit , Sun , and ends near Mercury's orbit , 1.5 x 10^11 m from the 6.86 x 10^10 m from the Sun? (Neglect any energy changes caused by the Earth…
A 1.2 kg mass is dropped on Earth from the top of a 40 m tall building . The mass starts from rest . When it reaches the ground , it is moving at 9.2 m / s . How much energy did drag dissipate while the mass was falling ? g = 9.8m / (s^2)
If a man can jump 64 cm vertically on the Earth, how high could he jump on Mars , assuming that his jump's energy does not change? Gravity of earth = 9.8 m/s^2; gravity of mars = 3.7 m/s^2
A certain baseball pitcher can throw a baseball at 90 miles-per-hour. Another pitcher is able to throw a base- ball at 99 miles -per-hour What is the ratio of the work that they do on the baseball when pitching , W_{99}/W_{90} (A baseball is at rest before the pitcher throws it.)
When stars like the Sun die, they eject their outer layers and expose their cores. Stars in this state are called white dwarf stars. These dead cores usually have a mass of about 1.2 x 10^30 kg (about 60% of the Sun's mass) with a radius of about 6.4 x 10^6 m (about the same as the Earth's…
A circle is a special case of an ellipse, in which both foci are in the same location. So, it is possible, although unlikely, for a planet to orbit in uniform circular motion with the Sun at the center, and gravity serving as the centripetal force. What velocity would a planet need to have in…
Two blocks are placed on a frictionless surface. The leftmost block has a mass of 5.00 kg and is pushed such that its velocity is 5 m/s to the right. The second block has mass of 10.0 kg and is initially stationary. If the blocks collide and stick together, what is the final velocity of the…
Two blocks are placed on a frictionless surface. The leftmost block has a mass of 5.00 kg and is pushed such that its velocity is 5.00 m/s to the right. The second block has mass of 10.0 kg and is initially stationary. If the blocks collide and stick together, what is the final velocity of the…