A ball is moved on a horizontal table with some velocity. The ball stops after moving some distance. Which external force is responsible for the change in the momentum of the ball?

A ball collides with a frictionless wall with velocity u as shown in the figure. Coefficient of restitution for the impact is e. (a) Find expression for the velocity of the ball immediately after the impact. (b) If impact is perfectly elastic what do you observe?

An ant is moving on the surface of a ball. Does it’s velocity change or not? Explain.

A ball of 0.20kg hits a wall at an angle of 45^(@) with a velocity of 25 ms^(-1) . If the rebounds at 90^(@) to the direction of incidence, calculate the change in momentum of the ball.

A body moving with uniform velocity is stopped in 0.25 second by applying a retarding force of 200 Newton. The intial momentum of the body will be :-

A ball collides elastically with a massive wall moving towards it with a velocity of v as shown. The collision occurs at a height of h above ground level and the velocity of the ball just before collision is 2v in horizontal direction. The distance between the foot of the wall and the point on the ground where the ball lands, at the instant the ball lands, will be :

A ball is moving with uniform translatory motion. This means that

Two very small balls A and B of masses 4.0kg and 5.0kg are affixed to the ends of a light inextensible cord that passes through a frictionless ring of radius negligible compared to the length of the cord. The ring is fixed at some height above the ground . Ball A is pulled aside and given a horizontal velocity so that it stars moving on a circular path parallel to the ground, keeping ball B in euilibrium as shown. speed of the ball A is closest to