A ball is dropped at t = 0 from a height 12 m above the ground. At the instant of release a very massive platform is at a height 4 m above the ground and moving upward with velocity 3 m//s as shown in the figure. Find : (a) the height reached by the ball after a perfectly elastic impact with the wall. the time when the ball strikes the platform second time.

A ball is dropped at t = 0 from a height 12 m above the ground. At the

1.	A ball is dropped at t = 0 from a height 12 m above the ground. At the instant of release a very massive platform is at a height 4 m above the ground and moving upward with velocity 3 m//s as shown in the figure. Find : (a) the height reached by the ball after a perfectly elastic impact with the wall. the time when the ball strikes the platform second time.
Answer» ANSWER :`[19.8"m above the GROUND" 3.6 s]`