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A ball hits a floor and rebounds after an inelastic collision. In this case:

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Important Questions on Centre of Mass, Momentum and Collisions

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Beta Question Bank for Engineering: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise-1>Q 19

Three balls A,B and CmA=mC=4mB are placed on a smooth horizontal surface. Ball B collides with ball C with an initial velocity v as shown in the figure. Total number of collisions between the balls with be (All collisions are elastic):-

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Beta Question Bank for Engineering: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise-1>Q 20
A body of mass 1kg strikes elastically with another body at rest and continues to move in the same direction with one fourth of the initial velocity. The mass of the other body is:- 
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Beta Question Bank for Engineering: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise-1>Q 21
A small bucket of mass M kg is attached to a long inextensible cord of length L m. the bucket is released from rest when the cord is in a horizontal position. At its lowest position, the bucket scoops up m kg of water and swings up to a height h. The height h in meters is:-
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Beta Question Bank for Engineering: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise-1>Q 22
A particle moving horizontally collides with a fixed plane inclined at 60° to the horizontal. If it bounces vertically, the coefficient of restitution is
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Beta Question Bank for Engineering: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise-1>Q 23
A ball of mass 2 m impinges directly on a ball of mass m, which is at rest. If the velocity with which the larger ball impinges be equal to the velocity of the smaller mass after impact then the coefficient of restitution:-
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Beta Question Bank for Engineering: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise-1>Q 24
A body of mass 2kg is projected upward from the surface of the ground at t=0 with a velocity of 20 m s-1. One second later a body B, also of mass 2kg, is dropped from a height of 20 m. If they collide elastically, then velocities just after collision are:-
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Beta Question Bank for Engineering: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise-1>Q 25

A ball of mass 1kg strikes a heavy platform, elastically, moving upwards with a velocity of 5 m s-1. The speed of the ball just before the collision is 10 m s-1 downwards. Then the impulse imparted by the platform on the ball is:-

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Beta Question Bank for Engineering: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise-1>Q 26
A 10 g rubber ball and a 10 g clay ball are each thrown at a wall with equal speeds. The rubber ball bounces; the clay ball sticks. Which ball receives the greater impulse from the wall?