Question

A metal ball hits a wall and does not rebound whereas a rubber ball of the same mass on hitting the wall rebounds with the same speed. It can be concluded that

• A. metal ball suffers greater change in momentum
• B. rubber ball suffers greater change in momentum.
• C. the initial momentum of metal ball is greater than the initial momentum of rubber ball.
• D. both suffer same change in momentum.

Answer 1

Answer: (B)

Change in momentum of metal ball is $=0-\left(-mv\right)=mv$
Change in momentum of rubber ball is $=mv-\left(-mv\right)=2mv$