A ball released from a height of 20 m hits the ground and rebounds to a height of 16 m. The percentage loss of energy during collision is
A)20%
B)40%
C)25%
D)75%

A ball dropped from a height of 2 m rebounds to a height of 1.5 m after hitting the ground. Then fraction of energy lost is

A body falls on the ground from a height of 10 m and rebounds to a height of 2.5 m calculate (i) the percentage loss of kinetic energy of the body during the collision with the ground (ii). The ratio of the velocities of the body just before and just after hte collision.

A ball is dropped from a height of 20 m in the floor and rebounds to 1.25 m after second collision, then coefficient of restitution e is

A body is dropped from a height of 16 m. The body strikes the ground and losses 25% of its velocity. The body rebounds to a height of

A ball of mass 1 kg is dropped from 20 m height on ground and it rebounds to height 5m. Find magnitude of change in momentum during its collision with the ground. (Take g=10m//s^(2) )

A ball of mass 20 g falls from a height of 10 m and after striking the ground.It rebounds from the ground to a height of 8 m . (a) Calculate: (i)The kinetic energy of the ball just before striking the ground ,and (ii)The loss in kinetic energy of the ball on striking the ground,and (ii)the loss in kinetic energy of the ball on striking the ground. (b)What happens to the loss in kinetic energy in part(ii) ? Take g=10 m s^(-2) Neglect air friction .

A ball falls under gravity from a height of 10 m with an initial downward velocity u. It collides with the ground, losses 50% of its energy in collision and then rises back to the same height. The initial velocity u is

An inelastic ball is dropped from a height of 100 m. Due to earth 20% of its energy is lost. To what height the ball will rise ?

A body falling on the ground from a height of 10m, rebounds to a height 2.5 m Calculate (i) The percentage loss in KE (ii) Ratio of the velocities of the body just before and just after the collision.

A ball is released from some height & rebounds with same speed after hitting the ground.If it travels 20m in first 8 seconds find the no of collision made.