A rubber ball dropped from a height of 20m`(g=10m/s^(2))` falls on the roof of an elevator going up at 2m/s. If the collision of the ball with the elevator is elastic, the ball rebounds with a velocity of?

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 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

Consider a rubber ball freely falling from a height h = 4.9 m on a horizontal elastic plate. Assume that the duration of collision is negligible and the collision with the plate is totally elastic. Then the velocity as a function of time and the height as a function of time will be:

A ball is dropped from a height of 20 m on a floor for which e = 1//2 . The height attained by the ball after the second collision

A ball is dropped from a height of 5 m, if it rebound upto height of 1.8 m, then the ratio of velocities of the ball after and before rebound is :

A ball of mass 10 gm dropped from a height of 5m hits the floor and rebounds to a height of 1.25m. If the ball is in contact with the ground for 0.1s, the force exerted by the ground on the ball is (g=10 m//s^(2))

A ball is dropped on the ground from a height of 1m . The coefficient of restitution is 0.6 . The height to which the ball will rebound is

A ball falls from a height such that it strikes the floor of lift at 10 m/s. If lift is moving in the upward direction with a velocity 1 m/s, then velocity with which the ball rebounds after elastic collision will be

A ball is dropped on the floor a height of 80 m rebounds to a height of 20 m . If the ball is in contact with floor for 0.1 s, the average acceleration during contact is