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Physics 101 Mechanics
December 2021
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Physics 101 Mechanics
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December 4, 2021
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December 4 of 2021
Take a video of an object that is moving horizontally and the net force acting on the object is in the opposite direction the object is moving . Explain and include free body diagram with explanation.
the following figure represents the force applied on a toy car. Calculate the work done to move the car through 1.5 m
The diagram shows a box being pulled along a horizontal surface with a force of 200.0 N Calculate the work done on the box to pull it a distance of 5.0 m (cos 45° = 0.71)
In the situations to the right, the guy can push or pull his girlfriend on the sled. The combined weight of the girl + sled is 630. N. According to theory, it takes more force to start an object in motion than it takes to keep it in motion. Therefore, there is a critical applied force required…
Displacement of a particle is given by the expression x=3t2+7t, where x is in meters and t is in seconds. What is acceleration?
The displacement x of a particle moving in one dimension under the action of the constant force is related to the time by the equation t=?x?3 where x is in meters and t is in seconds. Find the velocity of the particle at t = 3s.
What is the force between two small charged spheres having charges of 2 × 10–7C and 3 × 10–7 C placed 30 cm apart in the air?
Question 27 A closely wound solenoid of 800 turns and area of cross-section 2.5 × 10–4 m2 carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?
A piece of wire of resistance R is cut into five equal parts. These parts are then
Howard went on his bike from Delhi to Gurgaon at a speed of 60km/hr and came back at a speed of 40km/hr. What is his average speed for the entire journey?
A car starts from rest and acquires a velocity of 54 km/h in 2 sec. Find (i) the acceleration (ii) distance travelled by car assuming motion of car is uniform?
A ball is thrown upwards and it goes to the height 100 m and comes down 1) What is the net displacement? 2) What is the net distance?
What is the ratio of slopes of P-V graphs of adiabatic and isothermal processes?
An object moves with uniform positive acceleration. Its velocity-time graph will be (a) A straight line parallel to the time axis (b) A straight line inclined at an obtuse angle to the time axis (c) A straight line inclined at an acute angle to the time axis (d) None of these.
An electric appliance takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.
A block of mass 1 kg slides down on an inclined plane of inclination 60 degrees. Find the work done by the block’s weight as it slides through 100 cm.
What is the lowest total resistance that can be secured by combinations of four coils of resistances 4 ?, 8 ?, 12 ?, 24 ??
How can three resistors of resistances 2 Ω, 3 Ω and 6 Ω be connected to give a total resistance of (a) 4 Ω, (b) 1 Ω?
There are m resistors each of resistance R. First they all are connected in series and equivalent resistance is X. Now they are connected in parallel and equivalent resistance is Y. What is the ratio of X and Y?
A string of length 27 m has both ends free. Initially the string has a vertical displacement of the shape 3 + 4 cos(2x) with velocity 5 cos x m/s, where x is the length measured from one end. Define and solve the boundary value problem for the vertical displacement of this string with respect…
A string of length 27 m has both ends free. Initially the string has a vertical displacement of the shape 3 + 4 cos(2x) with velocity 5 cos x m/s, where x is the length measured from one end. Define and solve the boundary value problem for the vertical displacement of this string with respect…
if u=7m/s and v=9m/s what is change in momentum if m=9kg
thoughtful
SI unit of momentum
what is magniude of 2i+4j+6k
what is sum of i+j and 2i-j
The velocity of a body of mass 2 kg as a function of t is given by v(t ) = 2t i + t2 j . Find the momentum , at time t= 2s.
A woman throws an object of mass 500 g with a speed of 25 m s1. (b) If the object hits a wall and rebounds with half the original speed, what is the change in momentum of the object?
woman throws an object of mass 500 g with a speed of 25 m s1. (a) What is the impulse imparted to the object?
The velocity of a body of mass 2 kg as a function of t is given by v(t ) = 2t i + t2 jand the force acting on it, at time t= 2s.
A person of mass 50 kg stands on a weighing scale on a lift. If the lift is descending with a downward acceleration of 9 m s-2, what would be the reading of the weighing scale?
A car moves 100m due east and then 25 m due west. What is its displacement?
An object moves through 10m in 2 minutes and the next 10 m in 3 minutes. Calculate its average speed.
A car moves through 20 km at a speed of 40 km/h, and the next 20 km at a speed of 60 km/h. Calculate its average speed.
) The maximum speed of a train is 80 km/h. It takes 10 hours to cover a distance of 400 km. Find the ratio of its maximum speed to its average speed.
A bus takes 8 hours to cover a distance of 320 km.What is the average speed of the bus?
) A person walks along the sides of a square field. Each side is 100 m long. What is the maximum magnitude of displacement of the person at any time interval?
A car moves 100m due east and then 25 m due west. What is its displacement?
A car moves 100m due east and then 25 m due west. (a) What is the distance covered by the car?
A cricket ball is hit vertically upwards and returns to ground 6 s later. Calculate (i) Maximum height reached by the ball
A train starts from rest. It moves through 1 km in 100 s with uniform acceleration. What will be its speed at the end of 100 s.? (20 ms-1)
A car has a velocity of 10 ms-1. It accelerates at 0.2 ms-2 for half minute. Find the distance travelled during this time and the final velocity of the car.
A car moves with a uniform velocity of 40 ms-1 for 5 s. It comes to rest in the next 10 s with uniform deceleration. Find: deceleration
A car moves with a uniform velocity of 40 ms-1 for 5 s. It comes to rest in the next 10 s with uniform deceleration. Find: total distance travelled by car.
A train starts from rest with an acceleration of 0.5 ms-2. Find its speed in kmh-1, when it has moved through 100 m
A train moves with a uniform velocity of 36 kmh-1 for 10 s. Find the distance travelled by it.
A train is moving at a velocity of 25 ms-1. It is brought to rest by applying the brakes which produce uniform retardation of 0.5 ms-2. Calculate (i) the velocity of the train after 10 s
A train is moving at a velocity of 25 ms-1. It is brought to rest by applying the brakes which produce uniform retardation of 0.5 ms-2. Calculate (ii) If the mass of the train is 20000 kg then calculate the force required to stop the train
A stone falls from a building and reaches the ground 2.5 seconds later. How high is the building ? (g = 9.8 m/s^2)
A stone is dropped from a height of 20 m.(i) How long will it take to reach the ground
A stone is dropped from a height of 20 m. What will be its speed when it hits the ground? (g = 10 m/s^2)
A stone is thrown vertically upwards with a speed of 20 m/s. How high will it go before it begins to fall? (g = 9.8 m/s^2)
A force of 20 N acts upon a body whose weight is 9.8 N. What is the mass of the body and how much is its acceleration? (g = 9.8 m/ s^2).
A force causes an acceleration of 10 m/s^2 in a body of mass 500 g. What acceleration would be caused by the same force in a body of mass 5 kg.
A car starts from rest and accelerates uniformly over a time of 7 seconds for a distance of 98 m. Determine the acceleration of the car.
A car traveling at 20 m/s skids to a stop in 3 s. Determine the skidding distance of the car (assume uniform acceleration).
An airplane accelerates down a runway at 4 m/s^2 for 30 s until it finally lifts off the ground. Determine the distance traveled before takeoff.
If a rocket-powered sled is accelerated to a speed of 400 m/s in 2 seconds, then what is the acceleration
A bike accelerates uniformly from rest to a speed of 10 m/s over a distance of 30 m. Determine the acceleration of the bike.
A race car accelerates uniformly from 25 m/s to 50 m/s in 5 seconds. Determine the acceleration of the car and the distance traveled.
A force acts for 10 s on a stationary body of mass 100 kg after which the force ceases to act. The body moves through a distance of 100 m in the next 5 s. Calculate (iii) the magnitude of the force.
A force acts for 10 s on a stationary body of mass 100 kg after which the force ceases to act. The body moves through a distance of 100 m in the next 5 s. Calculate (ii) the acceleration produced by the force,
A force acts for 10 s on a stationary body of mass 100 kg after which the force ceases to act. The body moves through a distance of 100 m in the next 5 s. Calculate (i) the velocity acquired by the body,
A mass of 50 kg was moving with a velocity of 400 m/s. A force of 40000 N is applied to the mass and its velocity is reduced to 50 m/s after some time. What is the distance traveled by the mass during this period?
A force acts for 0.1 sec on a body of mass 2 kg initially at rest. The force is then withdrawn and the body moves with a velocity of 2 m/s. Find the magnitude of the force.
If the masses of the 2 objects are halfed then how will the gravitational force between them change?
If the masses of the 2 objects are doubled then how will the gravitational force between them change?
A force of 200 N is applied to a body and its velocity changes from 5m/s to 10m/s in a second. What is the mass of the body?
A mass of 1 kg is moving from east to west with a velocity of 10 m/s. A force is applied to it for 2 seconds and its velocity becomes 5 m/s. What is the value and direction of the force?
Momentum of an object changes from 100 kg m/s to 200 kg m/s in 2 seconds. What is the force applied to it?
A mass of 50 kg was moving with a velocity of 400 m/s. A force of 40000 N is applied to the mass and its velocity is reduced to 50 m/s after some time. What is the distance traveled by the mass during this period?
A ball of 150 g mass moves with 12 m/s and bounces back after hitting a wall with 20 m/s after a small duration of 0.01 second. What was the force applied to the ball when it hits the wall?
A force is applied to a mass of 16 kg for 3 seconds. As the force is removed the mass moves 81 meters in 3 seconds. What was the value of the force applied?
A car start from rest and acquire a velocity of 54 km/h in 2 sec. Find (i) the acceleration
A car start from rest and acquire a velocity of 54 km/h in 2 sec. Find (i) the acceleration
The maximum speed of a train is 90 km/h. It takes 10 hours to cover a distance of 500 km. Find the ratio of its average speed to maximum speed?
An object moves along a straight line with an acceleration of 2 m/s2. If its initial speed is 10 m/s, what will be its speed 2 s later?
The distance moved and the magnitude of displacement are equal in ? (a) The earth is revolving around the Sun (b) Object moving in circular path (c) The pendulum is moving to and fro (d) Object moving on straight road
An object travels 20 m in 2 s . What is the average speed of the object?
An object travels 20 m in 2 s and then another 16 m in 2 s. What is the average speed of the object?
An object dropped from a cliff falls with a constant acceleration of 10 m/s2. Find its speed 5 s after it was dropped.
Physics 101 Homework-One: Vectors Due Date: 6th December, 2021 1. Two vectors are given as \( \vec{A}=4.0 \hat{\imath}+6.0 \hat{\jmath} \) and \( \vec{B}=5.0 \hat{\imath}-2.0 \hat{\jmath} \) a) Sketch the vectors in a diagram and find magnitude and direction of each vector. b) The vector \(…
A relaxed biceps muscle requires a force of 25.0 N for an elongation of 3.0 cm; the same muscle under maximum tension requires a force of 500 N for the same elongation. Find Young’s Modulus for muscle tissue under each of this conditions if the muscle is assumed to be a uniform cylinder with…
calculate the momentum of a bullet of 20 gram when it is fired from a gun with a velocity of 100 metre per second.
What will be the momentum of a stone having the mass of 10 kg when it is thrown with a velocity of 4 metre per second?
A cricket ball covers 60 metre in 2 seconds. calculate the speed of the ball in kilometre per hour.
a car travels a distance of 360 km in 5 hours. what is speed in metre per second?
A light radiation of wavelength of 500 nm in air enters a glass of refractive index 1.5. Calculate (i) speed, (ii) frequency, (iii) wavelength of light radiation in glass. Assume the frequency of light is same in air and glass.
The refractive index of flint glass and alcohol is 1.65 and 1.36 respectively with respect to air. What is the refractive index of flint glass w.r.t alcohol?
Take a video of an object that is moving horizontally and the net force acting on the object is in the opposite direction the object is moving . Explain and include free body diagram with explanation.
the following figure represents the force applied on a toy car. Calculate the work done to move the car through 1.5 m
In the situations to the right, the guy can push or pull his girlfriend on the sled. The combined weight of the girl + sled is 630. N. According to theory, it takes more force to start an object in motion than it takes to keep it in motion. Therefore, there is a critical applied force required…
Displacement of a particle is given by the expression x=3t2+7t, where x is in meters and t is in seconds. What is acceleration?
The displacement x of a particle moving in one dimension under the action of the constant force is related to the time by the equation t=?x?3 where x is in meters and t is in seconds. Find the velocity of the particle at t = 3s.
What is the force between two small charged spheres having charges of 2 × 10–7C and 3 × 10–7 C placed 30 cm apart in the air?
Question 27 A closely wound solenoid of 800 turns and area of cross-section 2.5 × 10–4 m2 carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?
A piece of wire of resistance R is cut into five equal parts. These parts are then
Howard went on his bike from Delhi to Gurgaon at a speed of 60km/hr and came back at a speed of 40km/hr. What is his average speed for the entire journey?
A car starts from rest and acquires a velocity of 54 km/h in 2 sec. Find (i) the acceleration (ii) distance travelled by car assuming motion of car is uniform?
A ball is thrown upwards and it goes to the height 100 m and comes down 1) What is the net displacement? 2) What is the net distance?
What is the ratio of slopes of P-V graphs of adiabatic and isothermal processes?
An object moves with uniform positive acceleration. Its velocity-time graph will be (a) A straight line parallel to the time axis (b) A straight line inclined at an obtuse angle to the time axis (c) A straight line inclined at an acute angle to the time axis (d) None of these.
An electric appliance takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.
A block of mass 1 kg slides down on an inclined plane of inclination 60 degrees. Find the work done by the block’s weight as it slides through 100 cm.
What is the lowest total resistance that can be secured by combinations of four coils of resistances 4 ?, 8 ?, 12 ?, 24 ??
How can three resistors of resistances 2 Ω, 3 Ω and 6 Ω be connected to give a total resistance of (a) 4 Ω, (b) 1 Ω?
There are m resistors each of resistance R. First they all are connected in series and equivalent resistance is X. Now they are connected in parallel and equivalent resistance is Y. What is the ratio of X and Y?
A string of length 27 m has both ends free. Initially the string has a vertical displacement of the shape 3 + 4 cos(2x) with velocity 5 cos x m/s, where x is the length measured from one end. Define and solve the boundary value problem for the vertical displacement of this string with respect…
A string of length 27 m has both ends free. Initially the string has a vertical displacement of the shape 3 + 4 cos(2x) with velocity 5 cos x m/s, where x is the length measured from one end. Define and solve the boundary value problem for the vertical displacement of this string with respect…
if u=7m/s and v=9m/s what is change in momentum if m=9kg
thoughtful
SI unit of momentum
what is magniude of 2i+4j+6k
what is sum of i+j and 2i-j
The velocity of a body of mass 2 kg as a function of t is given by v(t ) = 2t i + t2 j . Find the momentum , at time t= 2s.
A woman throws an object of mass 500 g with a speed of 25 m s1. (b) If the object hits a wall and rebounds with half the original speed, what is the change in momentum of the object?
woman throws an object of mass 500 g with a speed of 25 m s1. (a) What is the impulse imparted to the object?
The velocity of a body of mass 2 kg as a function of t is given by v(t ) = 2t i + t2 jand the force acting on it, at time t= 2s.
A person of mass 50 kg stands on a weighing scale on a lift. If the lift is descending with a downward acceleration of 9 m s-2, what would be the reading of the weighing scale?
A car moves 100m due east and then 25 m due west. What is its displacement?
An object moves through 10m in 2 minutes and the next 10 m in 3 minutes. Calculate its average speed.
A car moves through 20 km at a speed of 40 km/h, and the next 20 km at a speed of 60 km/h. Calculate its average speed.
) The maximum speed of a train is 80 km/h. It takes 10 hours to cover a distance of 400 km. Find the ratio of its maximum speed to its average speed.
A bus takes 8 hours to cover a distance of 320 km.What is the average speed of the bus?
) A person walks along the sides of a square field. Each side is 100 m long. What is the maximum magnitude of displacement of the person at any time interval?
A car moves 100m due east and then 25 m due west. What is its displacement?
A car moves 100m due east and then 25 m due west. (a) What is the distance covered by the car?
A cricket ball is hit vertically upwards and returns to ground 6 s later. Calculate (i) Maximum height reached by the ball
A train starts from rest. It moves through 1 km in 100 s with uniform acceleration. What will be its speed at the end of 100 s.? (20 ms-1)
A car has a velocity of 10 ms-1. It accelerates at 0.2 ms-2 for half minute. Find the distance travelled during this time and the final velocity of the car.
A car moves with a uniform velocity of 40 ms-1 for 5 s. It comes to rest in the next 10 s with uniform deceleration. Find: deceleration
A car moves with a uniform velocity of 40 ms-1 for 5 s. It comes to rest in the next 10 s with uniform deceleration. Find: total distance travelled by car.
A train starts from rest with an acceleration of 0.5 ms-2. Find its speed in kmh-1, when it has moved through 100 m
A train moves with a uniform velocity of 36 kmh-1 for 10 s. Find the distance travelled by it.
A train is moving at a velocity of 25 ms-1. It is brought to rest by applying the brakes which produce uniform retardation of 0.5 ms-2. Calculate (i) the velocity of the train after 10 s
A train is moving at a velocity of 25 ms-1. It is brought to rest by applying the brakes which produce uniform retardation of 0.5 ms-2. Calculate (ii) If the mass of the train is 20000 kg then calculate the force required to stop the train
A stone falls from a building and reaches the ground 2.5 seconds later. How high is the building ? (g = 9.8 m/s^2)
A stone is dropped from a height of 20 m.(i) How long will it take to reach the ground
A stone is dropped from a height of 20 m. What will be its speed when it hits the ground? (g = 10 m/s^2)
A stone is thrown vertically upwards with a speed of 20 m/s. How high will it go before it begins to fall? (g = 9.8 m/s^2)
A force of 20 N acts upon a body whose weight is 9.8 N. What is the mass of the body and how much is its acceleration? (g = 9.8 m/ s^2).
A force causes an acceleration of 10 m/s^2 in a body of mass 500 g. What acceleration would be caused by the same force in a body of mass 5 kg.
A car starts from rest and accelerates uniformly over a time of 7 seconds for a distance of 98 m. Determine the acceleration of the car.
A car traveling at 20 m/s skids to a stop in 3 s. Determine the skidding distance of the car (assume uniform acceleration).
An airplane accelerates down a runway at 4 m/s^2 for 30 s until it finally lifts off the ground. Determine the distance traveled before takeoff.
If a rocket-powered sled is accelerated to a speed of 400 m/s in 2 seconds, then what is the acceleration
A bike accelerates uniformly from rest to a speed of 10 m/s over a distance of 30 m. Determine the acceleration of the bike.
A race car accelerates uniformly from 25 m/s to 50 m/s in 5 seconds. Determine the acceleration of the car and the distance traveled.
A force acts for 10 s on a stationary body of mass 100 kg after which the force ceases to act. The body moves through a distance of 100 m in the next 5 s. Calculate (iii) the magnitude of the force.
A force acts for 10 s on a stationary body of mass 100 kg after which the force ceases to act. The body moves through a distance of 100 m in the next 5 s. Calculate (ii) the acceleration produced by the force,
A force acts for 10 s on a stationary body of mass 100 kg after which the force ceases to act. The body moves through a distance of 100 m in the next 5 s. Calculate (i) the velocity acquired by the body,
A mass of 50 kg was moving with a velocity of 400 m/s. A force of 40000 N is applied to the mass and its velocity is reduced to 50 m/s after some time. What is the distance traveled by the mass during this period?
A force acts for 0.1 sec on a body of mass 2 kg initially at rest. The force is then withdrawn and the body moves with a velocity of 2 m/s. Find the magnitude of the force.
If the masses of the 2 objects are halfed then how will the gravitational force between them change?
If the masses of the 2 objects are doubled then how will the gravitational force between them change?
A force of 200 N is applied to a body and its velocity changes from 5m/s to 10m/s in a second. What is the mass of the body?
A mass of 1 kg is moving from east to west with a velocity of 10 m/s. A force is applied to it for 2 seconds and its velocity becomes 5 m/s. What is the value and direction of the force?
Momentum of an object changes from 100 kg m/s to 200 kg m/s in 2 seconds. What is the force applied to it?
A ball of 150 g mass moves with 12 m/s and bounces back after hitting a wall with 20 m/s after a small duration of 0.01 second. What was the force applied to the ball when it hits the wall?
A force is applied to a mass of 16 kg for 3 seconds. As the force is removed the mass moves 81 meters in 3 seconds. What was the value of the force applied?
A car start from rest and acquire a velocity of 54 km/h in 2 sec. Find (i) the acceleration
A car start from rest and acquire a velocity of 54 km/h in 2 sec. Find (i) the acceleration
The maximum speed of a train is 90 km/h. It takes 10 hours to cover a distance of 500 km. Find the ratio of its average speed to maximum speed?
An object moves along a straight line with an acceleration of 2 m/s2. If its initial speed is 10 m/s, what will be its speed 2 s later?
The distance moved and the magnitude of displacement are equal in ? (a) The earth is revolving around the Sun (b) Object moving in circular path (c) The pendulum is moving to and fro (d) Object moving on straight road
An object travels 20 m in 2 s . What is the average speed of the object?
An object travels 20 m in 2 s and then another 16 m in 2 s. What is the average speed of the object?
An object dropped from a cliff falls with a constant acceleration of 10 m/s2. Find its speed 5 s after it was dropped.
Physics 101 Homework-One: Vectors Due Date: 6th December, 2021 1. Two vectors are given as \( \vec{A}=4.0 \hat{\imath}+6.0 \hat{\jmath} \) and \( \vec{B}=5.0 \hat{\imath}-2.0 \hat{\jmath} \) a) Sketch the vectors in a diagram and find magnitude and direction of each vector. b) The vector \(…
calculate the momentum of a bullet of 20 gram when it is fired from a gun with a velocity of 100 metre per second.
What will be the momentum of a stone having the mass of 10 kg when it is thrown with a velocity of 4 metre per second?
A cricket ball covers 60 metre in 2 seconds. calculate the speed of the ball in kilometre per hour.
a car travels a distance of 360 km in 5 hours. what is speed in metre per second?
A light radiation of wavelength of 500 nm in air enters a glass of refractive index 1.5. Calculate (i) speed, (ii) frequency, (iii) wavelength of light radiation in glass. Assume the frequency of light is same in air and glass.
The refractive index of flint glass and alcohol is 1.65 and 1.36 respectively with respect to air. What is the refractive index of flint glass w.r.t alcohol?