Question

A ball is dropped from a height $h$ to the ground. Assume that the collision between the ground and the ball is perfectly elastic. Then, choose the correct statement.

• A. $\text{The ball keeps on bouncing for infinite amount of time}$.
• B. $\text{The ball stops bouncing after some time.}$
• C. $\text{The velocity of the ball keeps on reducing with time.}$
• D. $\text{None of these}$

Answer 1

The correct option is A $\text{The ball keeps on bouncing for infinite amount of time}$.

Since the collisions are perfectly elastic, no energy is lost from the ball. Hence the ball keeps on bouncing for an infinite amount of time.
$\therefore$ Correct option is (a).