An elevator platform is going up at a speed of `20 m//s` and during its upward motion a small ball of `50 g` mass, falling in downward direction, strikes the platform at speed `5 m//s`. Find the speed with which the ball rebounds.

An elevator platform is going up at a speed 20 ms^(-1) and during its upward motion a small ball of 50 g mass falling in downward direction strikes the platform elastically at a speed 5 ms^(-1) . Find the speed (in ms^(-1) ) with which the ball rebounds.

What happens to the speed of the ball during its downward motion ?

A ball is thrown up at a speed of 4.0 m/s. Find the maximum height reached by the ball. Take g=10 m//s^2 .

A ball is thrown up at a speed of 4.0 m/s. Find the maximum height reached by the ball. Take g=10 m//s^2 .

A ball is thrown up at a speed of 4.0 m/s. Find the maximum height reached by the ball. Take g=10 m//s^2 .

A ball is projected vertically upward with a speed of 50 m/s. Find the time to reach the maximum height,

A ball is projected vertically upward with a speed of 50 m/s. Find the maximum height.

A ball moving vertically downward with a speed of 10 m//s collides with a platform. The platform moves with a velocity of 5 m//s in downward direction. If e = 0.8 , find the speed (in m//s ) of the ball just after collision.

A ball moving vertically downward with a speed of 10 m//s collides with a platform. The platform moves with a velocity of 5 m//s in downward direction. If e = 0.8 , find the speed (in m//s ) of the ball just after collision.