Question

A ball is dropped vertically from a height d above the ground it hits the ground and bounces up vertically to a height divide to neglecting subsequent motion and a resistance its speed v varies with the height h above the ground as

Answer 1

Answer:

Is there a question here?

Explanation:

Answer 2

The graph between h and v will be a parabola. At h=d , velocity is zero,

( Taking downward direction as negative)

Then its negetive value increases , and at h=0 velocity gets reversed and then goes on decreasing and becomes zero at h=d/2

Hence a is the correct answer