Classes

First Year Physics Motion and Force A truck weighing 2500 \mathrm{~kg} and moving with a velocity of 21 \mathrm{~ms}^{-1} collides with a stationary car weighing 1000 \mathrm{~kg} . The truck and the car move together after the imp


Change the way you learn with Maqsad's classes. Local examples, engaging animations, and instant video solutions keep you on your toes and make learning fun like never before!

Class 9Class 10First YearSecond Year
A truck weighing 2500 \mathrm{~kg} and moving with a velocity of 21 \mathrm{~ms}^{-1} collides with a stationary car weighing 1000 \mathrm{~kg} . The truck and the car move together after the impact. Calculate their common velocity.

A boy places a fire cracker of negligible mass in an empty can of 40 \mathrm{~g} mass. He plugs the end with a wooden block of mass 200 \mathrm{~g} . After igniting the firecracker he throws the can straight up. It explodes at the top of its path. If the block shoots out with a speed of 3 \mathrm{~ms}^{-1} how fast will the can be going?
A boy places a fire cracker of negligible mass in an empty can of  40 \mathrm{~g}  mass. He plugs the end with a wooden block of mass  200 \mathrm{~g} . After igniting the firecracker he throws the can straight up. It explodes at the top of its path. If the block shoots out with a speed of  3 \mathrm{~ms}^{-1}  how fast will the can be going?

A boy places a fire cracker of negligible mass in an empty can of 40 \mathrm{~g} mass. He plugs the end with a wooden block of mass 200 \mathrm{~g} . After igniting the firecracker he throws the can straight up. It explodes at the top of its path. If the block shoots out with a speed of 3 \mathrm{~ms}^{-1} how fast will the can be going?

Explain the circumstances in which the velocity " v " and acceleration "a" of a car are:(iv) " v " " is zero but "a" is not
Explain the circumstances in which the velocity "  v  " and acceleration "a" of a car are:(iv) "  v "  " is zero but "a" is not

Explain the circumstances in which the velocity " v " and acceleration "a" of a car are:(iv) " v " " is zero but "a" is not

Explain the circumstances in which the velocity " v " and acceleration "a" of a car are:(v) "a" is zero but " v " is not zero
Explain the circumstances in which the velocity "  v  " and acceleration "a" of a car are:(v) "a" is zero but "  v  " is not zero

Explain the circumstances in which the velocity " v " and acceleration "a" of a car are:(v) "a" is zero but " v " is not zero

A hose pipe ejects water at a speed of 0.3 \mathrm{~ms}^{-1} through a hole of area 50 \mathrm{~cm}^{2} . If the water strikes a wall normally calculate the force on the wall assuming the velocity of the water normal to the wall is zero after striking.
A hose pipe ejects water at a speed of  0.3 \mathrm{~ms}^{-1}  through a hole of area  50 \mathrm{~cm}^{2} . If the water strikes a wall normally calculate the force on the wall assuming the velocity of the water normal to the wall is zero after striking.

A hose pipe ejects water at a speed of 0.3 \mathrm{~ms}^{-1} through a hole of area 50 \mathrm{~cm}^{2} . If the water strikes a wall normally calculate the force on the wall assuming the velocity of the water normal to the wall is zero after striking.

Each of the following questions is followed by four answers one of which is correct answer. Identified that answer.(i) What is meant by a ballistic trajectory?(a) The paths followed by an un-powered and unguided projectile is called ballistic trajectory.(b) The path followed by the powered and unguided projectile is called ballistic trajectory.(c) The path followed by un-powered but guided projectile.(d) The path followed by powered and guided projectile.
Each of the following questions is followed by four answers one of which is correct answer. Identified that answer.(i) What is meant by a ballistic trajectory?(a) The paths followed by an un-powered and unguided projectile is called ballistic trajectory.(b) The path followed by the powered and unguided projectile is called ballistic trajectory.(c) The path followed by un-powered but guided projectile.(d) The path followed by powered and guided projectile.

Each of the following questions is followed by four answers one of which is correct answer. Identified that answer.(i) What is meant by a ballistic trajectory?(a) The paths followed by an un-powered and unguided projectile is called ballistic trajectory.(b) The path followed by the powered and unguided projectile is called ballistic trajectory.(c) The path followed by un-powered but guided projectile.(d) The path followed by powered and guided projectile.

A 1500 kg car has its velocity reduced from 20 \mathrm{~ms}^{-1} to 15 \mathrm{~ms}^{-1} in 3 . S . How large was the average retarding force.
A 1500 kg car has its velocity reduced from  20 \mathrm{~ms}^{-1}  to  15 \mathrm{~ms}^{-1}  in  3 . S . How large was the average retarding force.

A 1500 kg car has its velocity reduced from 20 \mathrm{~ms}^{-1} to 15 \mathrm{~ms}^{-1} in 3 . S . How large was the average retarding force.

Explain the circumstances in which the velocity " v " and acceleration "a" of a car are:(iii) Perpendicular to one another
Explain the circumstances in which the velocity "  v  " and acceleration "a" of a car are:(iii) Perpendicular to one another

Explain the circumstances in which the velocity " v " and acceleration "a" of a car are:(iii) Perpendicular to one another

Example 3.7: A ball is thrown with a speed of so 30 \mathrm{~ms}^{-1} in a direction 30^{\circ} above the horizon. Determine the height to which it rises the time of flight and the horizontal range.
Example 3.7: A ball is thrown with a speed of so  30 \mathrm{~ms}^{-1}  in a direction  30^{\circ}  above the horizon. Determine the height to which it rises the time of flight and the horizontal range.

Example 3.7: A ball is thrown with a speed of so 30 \mathrm{~ms}^{-1} in a direction 30^{\circ} above the horizon. Determine the height to which it rises the time of flight and the horizontal range.

A truck weighing 2500 \mathrm{~kg} and moving with a velocity of 21 \mathrm{~ms}^{-1} collides with a stationary car weighing 1000 \mathrm{~kg} . The truck and the car move together after the impact. Calculate their common velocity.
A truck weighing  2500 \mathrm{~kg}  and moving with a velocity of  21 \mathrm{~ms}^{-1}  collides with a stationary car weighing  1000 \mathrm{~kg} . The truck and the car move together after the impact. Calculate their common velocity.
now playing

A truck weighing 2500 \mathrm{~kg} and moving with a velocity of 21 \mathrm{~ms}^{-1} collides with a stationary car weighing 1000 \mathrm{~kg} . The truck and the car move together after the impact. Calculate their common velocity.

Using the following data draw a velocity-time graph for a short journey on a straight road of a motorbike.\begin{tabular}{|l|c|c|c|c|c|c|c|}\hline Velocity \left(\mathrm{ms}^{-1}\right) & 0 & 10 & 20 & 20 & 20 & 20 & 0 \\\hline Time (s) & 0 & 30 & 60 & 90 & 120 & 150 & 180 \\\hline\end{tabular}Use the graph to calculate(b) The final acceleration
Using the following data draw a velocity-time graph for a short journey on a straight road of a motorbike.\begin{tabular}{|l|c|c|c|c|c|c|c|}\hline Velocity  \left(\mathrm{ms}^{-1}\right)  & 0 & 10 & 20 & 20 & 20 & 20 & 0 \\\hline Time (s) & 0 & 30 & 60 & 90 & 120 & 150 & 180 \\\hline\end{tabular}Use the graph to calculate(b) The final acceleration

Using the following data draw a velocity-time graph for a short journey on a straight road of a motorbike.\begin{tabular}{|l|c|c|c|c|c|c|c|}\hline Velocity \left(\mathrm{ms}^{-1}\right) & 0 & 10 & 20 & 20 & 20 & 20 & 0 \\\hline Time (s) & 0 & 30 & 60 & 90 & 120 & 150 & 180 \\\hline\end{tabular}Use the graph to calculate(b) The final acceleration

Find the change in momentum for an object subjected to a given force for a given time and state law of motion in terms of momentum.
Find the change in momentum for an object subjected to a given force for a given time and state law of motion in terms of momentum.

Find the change in momentum for an object subjected to a given force for a given time and state law of motion in terms of momentum.

Prove that for angles of projection which exceed or fall short of 45^{\circ} by equal amounts the ranges are equal.
Prove that for angles of projection which exceed or fall short of  45^{\circ}  by equal amounts the ranges are equal.

Prove that for angles of projection which exceed or fall short of 45^{\circ} by equal amounts the ranges are equal.

A helicopter is ascending vertically at the rate of 19.6 \mathrm{~ms}^{-1} . When it is at a height of 156.8 \mathrm{~m} above the ground a stone is dropped. How long does the stone take to reach the ground?
A helicopter is ascending vertically at the rate of  19.6 \mathrm{~ms}^{-1} . When it is at a height of  156.8 \mathrm{~m}  above the ground a stone is dropped. How long does the stone take to reach the ground?

A helicopter is ascending vertically at the rate of 19.6 \mathrm{~ms}^{-1} . When it is at a height of 156.8 \mathrm{~m} above the ground a stone is dropped. How long does the stone take to reach the ground?

Example 3.5: A 100 \mathrm{~g} golf ball is moving to the right with a velocity of 20 \mathrm{~ms}^{-1} . It makes a head on collision with an 8 \mathrm{~kg} steel ball initially at rest. Compute velocities of the balls after collision.
Example 3.5: A  100 \mathrm{~g}  golf ball is moving to the right with a velocity of  20 \mathrm{~ms}^{-1} . It makes a head on collision with an  8 \mathrm{~kg}  steel ball initially at rest. Compute velocities of the balls after collision.

Example 3.5: A 100 \mathrm{~g} golf ball is moving to the right with a velocity of 20 \mathrm{~ms}^{-1} . It makes a head on collision with an 8 \mathrm{~kg} steel ball initially at rest. Compute velocities of the balls after collision.

Example 3.8: In example 3.7 calculate the maximum range and the height reached by the ball if the angles of projection are (i) 45^{\circ} (ii) 60^{\circ} .
Example 3.8: In example  3.7  calculate the maximum range and the height reached by the ball if the angles of projection are (i)  45^{\circ}  (ii)  60^{\circ} .

Example 3.8: In example 3.7 calculate the maximum range and the height reached by the ball if the angles of projection are (i) 45^{\circ} (ii) 60^{\circ} .

A bomber dropped a bomb at a height of 490 \mathrm{~m} when its velocity along the horizontal was 300 \mathrm{kmh}^{-1} .(a) At what distance from the point vertically below the bomber at the instant bomb was dropped did it strike the ground?
A bomber dropped a bomb at a height of  490 \mathrm{~m}  when its velocity along the horizontal was  300 \mathrm{kmh}^{-1} .(a) At what distance from the point vertically below the bomber at the instant bomb was dropped did it strike the ground?

A bomber dropped a bomb at a height of 490 \mathrm{~m} when its velocity along the horizontal was 300 \mathrm{kmh}^{-1} .(a) At what distance from the point vertically below the bomber at the instant bomb was dropped did it strike the ground?

Two blocks of masses 2.0 \mathrm{~kg} and 0.5 \mathrm{~kg} are attached at the two ends of a compressed spring. The elastic potential energy stored in the spring in 10 \mathrm{~J} . Find the velocities of the blocks if the spring delivers its energy to the blocks when released.
Two blocks of masses  2.0 \mathrm{~kg}  and  0.5 \mathrm{~kg}  are attached at the two ends of a compressed spring. The elastic potential energy stored in the spring in  10 \mathrm{~J} . Find the velocities of the blocks if the spring delivers its energy to the blocks when released.

Two blocks of masses 2.0 \mathrm{~kg} and 0.5 \mathrm{~kg} are attached at the two ends of a compressed spring. The elastic potential energy stored in the spring in 10 \mathrm{~J} . Find the velocities of the blocks if the spring delivers its energy to the blocks when released.

Each of the following questions is followed by four answers one of which is correct answer. Identified that answer.(ii) What happens when two-body system undergoes elastic collision?(a) The momentum of the system changes.(b) The momentum of the system does not change.(c) The bodies come to rest after collision.(d) The energy conservation law is violated.
Each of the following questions is followed by four answers one of which is correct answer. Identified that answer.(ii) What happens when two-body system undergoes elastic collision?(a) The momentum of the system changes.(b) The momentum of the system does not change.(c) The bodies come to rest after collision.(d) The energy conservation law is violated.

Each of the following questions is followed by four answers one of which is correct answer. Identified that answer.(ii) What happens when two-body system undergoes elastic collision?(a) The momentum of the system changes.(b) The momentum of the system does not change.(c) The bodies come to rest after collision.(d) The energy conservation law is violated.

A football is thrown upward with an angle of 30^{\circ} with respect to the horizontal. To throw a 40 mass what must be the initial speed of the ball?
A football is thrown upward with an angle of  30^{\circ}  with respect to the horizontal. To throw a 40 mass what must be the initial speed of the ball?
video locked

A football is thrown upward with an angle of 30^{\circ} with respect to the horizontal. To throw a 40 mass what must be the initial speed of the ball?

An amoeba of mass 1.0 \times 10^{-12} \mathrm{~kg} propels itself through water by blowing a jet of water through a tiny orifice. The amoeba ejects water with a speed of 1.0 \times 10^{-4} \mathrm{~ms}^{-1} and at a rate of 1.0 \times 10^{-13} \mathrm{kgs}^{-1} . Assume that the water is being continuously replenished so that the mass of the amoeba remains the same.(a) If there were no force on amoeba other than the reaction force caused by the emerging jet what would be the acceleration of the amoeba?(b) If amoeba moves with constant velocity through water what is force of surrounding water (exclusively of jet) on the amoeba?
An amoeba of mass  1.0 \times 10^{-12} \mathrm{~kg}  propels itself through water by blowing a jet of water through a tiny orifice. The amoeba ejects water with a speed of  1.0 \times 10^{-4} \mathrm{~ms}^{-1}  and at a rate of  1.0 \times 10^{-13} \mathrm{kgs}^{-1} . Assume that the water is being continuously replenished so that the mass of the amoeba remains the same.(a) If there were no force on amoeba other than the reaction force caused by the emerging jet what would be the acceleration of the amoeba?(b) If amoeba moves with constant velocity through water what is force of surrounding water (exclusively of jet) on the amoeba?
video locked

An amoeba of mass 1.0 \times 10^{-12} \mathrm{~kg} propels itself through water by blowing a jet of water through a tiny orifice. The amoeba ejects water with a speed of 1.0 \times 10^{-4} \mathrm{~ms}^{-1} and at a rate of 1.0 \times 10^{-13} \mathrm{kgs}^{-1} . Assume that the water is being continuously replenished so that the mass of the amoeba remains the same.(a) If there were no force on amoeba other than the reaction force caused by the emerging jet what would be the acceleration of the amoeba?(b) If amoeba moves with constant velocity through water what is force of surrounding water (exclusively of jet) on the amoeba?

Two masses m_{1} and m_{2} are initially at rest with a spring compressed between them. What is the magnitude of ratio of their velocities after the spring has been released?
Two masses  m_{1}  and  m_{2}  are initially at rest with a spring compressed between them. What is the magnitude of ratio of their velocities after the spring has been released?
video locked

Two masses m_{1} and m_{2} are initially at rest with a spring compressed between them. What is the magnitude of ratio of their velocities after the spring has been released?

A bomber dropped a bomb at a height of 490 \mathrm{~m} when its velocity along the horizontal was 300 \mathrm{kmh}^{-1} .(b) How long was it in air?
A bomber dropped a bomb at a height of  490 \mathrm{~m}  when its velocity along the horizontal was  300 \mathrm{kmh}^{-1} .(b) How long was it in air?
video locked

A bomber dropped a bomb at a height of 490 \mathrm{~m} when its velocity along the horizontal was 300 \mathrm{kmh}^{-1} .(b) How long was it in air?

A proton moving with speed of 1.0 \times 10^{7} \mathrm{~ms}^{-1} passes through a 0.02 \mathrm{~cm} thick sheet of paper and emerges with a speed of 2.0 \times 10^{6} \mathrm{~ms}^{-1} . Assuming uniform deceleration find retardation and time taken to pass through the paper.
A proton moving with speed of  1.0 \times 10^{7} \mathrm{~ms}^{-1}  passes through a  0.02 \mathrm{~cm}  thick sheet of paper and emerges with a speed of  2.0 \times 10^{6} \mathrm{~ms}^{-1} . Assuming uniform deceleration find retardation and time taken to pass through the paper.
video locked

A proton moving with speed of 1.0 \times 10^{7} \mathrm{~ms}^{-1} passes through a 0.02 \mathrm{~cm} thick sheet of paper and emerges with a speed of 2.0 \times 10^{6} \mathrm{~ms}^{-1} . Assuming uniform deceleration find retardation and time taken to pass through the paper.

Explain the circumstances in which the velocity "v" and acceleration "a" of a car are:(ii) Anti-parallel
Explain the circumstances in which the velocity "v" and acceleration "a" of a car are:(ii) Anti-parallel
video locked

Explain the circumstances in which the velocity "v" and acceleration "a" of a car are:(ii) Anti-parallel

An electron \left(\mathrm{m}=9.1 \times 10^{-31} \mathrm{~kg}\right) traveling at 2.0 \times 10^{7} \mathrm{~ms}^{-1} undergoes a head on collision with a hydrogen atom \left(\mathrm{m}=1.67 \times 10^{-27} \mathrm{~kg}\right) which is initially at rest. Assuming the collision to be perfectly elastic and a motion to be along a straight line find the velocity of hydrogen atom?
An electron  \left(\mathrm{m}=9.1 \times 10^{-31} \mathrm{~kg}\right)  traveling at  2.0 \times 10^{7} \mathrm{~ms}^{-1}  undergoes a head on collision with a hydrogen atom  \left(\mathrm{m}=1.67 \times 10^{-27} \mathrm{~kg}\right)  which is initially at rest. Assuming the collision to be perfectly elastic and a motion to be along a straight line find the velocity of hydrogen atom?
video locked

An electron \left(\mathrm{m}=9.1 \times 10^{-31} \mathrm{~kg}\right) traveling at 2.0 \times 10^{7} \mathrm{~ms}^{-1} undergoes a head on collision with a hydrogen atom \left(\mathrm{m}=1.67 \times 10^{-27} \mathrm{~kg}\right) which is initially at rest. Assuming the collision to be perfectly elastic and a motion to be along a straight line find the velocity of hydrogen atom?

Using the following data draw a velocity-time graph for a short journey on a straight road of a motorbike.\begin{tabular}{|l|c|c|c|c|c|c|c|}\hline Velocity \left(\mathrm{ms}^{-1}\right) & 0 & 10 & 20 & 20 & 20 & 20 & 0 \\\hline Time (\mathrm{s}) & 0 & 30 & 60 & 90 & 120 & 150 & 180 \\\hline\end{tabular}Use the graph to calculate(a) The initial acceleration
Using the following data draw a velocity-time graph for a short journey on a straight road of a motorbike.\begin{tabular}{|l|c|c|c|c|c|c|c|}\hline Velocity  \left(\mathrm{ms}^{-1}\right)  & 0 & 10 & 20 & 20 & 20 & 20 & 0 \\\hline Time  (\mathrm{s})  & 0 & 30 & 60 & 90 & 120 & 150 & 180 \\\hline\end{tabular}Use the graph to calculate(a) The initial acceleration
video locked

Using the following data draw a velocity-time graph for a short journey on a straight road of a motorbike.\begin{tabular}{|l|c|c|c|c|c|c|c|}\hline Velocity \left(\mathrm{ms}^{-1}\right) & 0 & 10 & 20 & 20 & 20 & 20 & 0 \\\hline Time (\mathrm{s}) & 0 & 30 & 60 & 90 & 120 & 150 & 180 \\\hline\end{tabular}Use the graph to calculate(a) The initial acceleration

Find the angle of projection of a projectile for which its maximum height and horizontal range are equal.
Find the angle of projection of a projectile for which its maximum height and horizontal range are equal.
video locked

Find the angle of projection of a projectile for which its maximum height and horizontal range are equal.

State the law of conservation of linear momentum pointing out the importance of isolated system. Explain why under certain conditions the law is useful even though the system is not completely isolated?
State the law of conservation of linear momentum pointing out the importance of isolated system. Explain why under certain conditions the law is useful even though the system is not completely isolated?
video locked

State the law of conservation of linear momentum pointing out the importance of isolated system. Explain why under certain conditions the law is useful even though the system is not completely isolated?

A SLBM (submarine launched ballistic missile) is fired from a distance of 3000 \mathrm{~km} . If the Earth were flat and the angle of launch is 45^{\circ} with horizontal find the time taken by SLBM to hit the target and the velocity with which the missile is fired.
A SLBM (submarine launched ballistic missile) is fired from a distance of  3000 \mathrm{~km} . If the Earth were flat and the angle of launch is  45^{\circ}  with horizontal find the time taken by SLBM to hit the target and the velocity with which the missile is fired.
video locked

A SLBM (submarine launched ballistic missile) is fired from a distance of 3000 \mathrm{~km} . If the Earth were flat and the angle of launch is 45^{\circ} with horizontal find the time taken by SLBM to hit the target and the velocity with which the missile is fired.

MDCAT/ ECAT question bank