question_answer

A boy throws a ball with speed u in a well of depth \[14\text{ }m\]as shown. On bounce with bottom of the well the speed of the ball gets halved. What should be the minimum value of u in \[(m/s)\] such that the ball may be able to reach his hand again? Assume that his hands are at 1 m height from top of the well while throwing and catching.

Answer:

30