First slide
Collisions
Question

A lead ball strikes a wall and falls down, a tennis ball having the same mass and velocity strikes the wall and bounces back. Check the correct statement

Moderate
Solution

Change in the momentum = Final momentum – initial momentum 

For lead ball  ΔPlead=0mv=mv
For tennis ball  ΔPtennis=mvmv=2mv
i.e. tennis ball suffers a greater change in momentum.

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