Question

A ball of mass $m$ collides with a wall with speed $v$ and rebounds on the same line with the same speed. If the mass of the wall is taken as infinite, then the work done by the ball on the wall is:

• A. $m{v}^2$
• B. $\frac{1}{2}m{v}^2$
• C. $2mv$
• D. Zero

Answer 1

The correct option is D Zero

The ball rebounds with the same speed. So change in it's Kinetic energy will be zero i.e. work done by the ball on the wall is zero.