A lead ball strikes a wall and falls down while a tennis ball having the same mass and velocity strikes the wall and bounces back. Check the correct statement.
A
The momentum of the lead ball is greater than that of the tennis ball.
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B
The lead ball suffers a greater change in momentum compared with the tennis ball.
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C
The tennis ball suffers a greater change in momentum as compared with the lead ball.
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D
Both suffer an equal change in momentum.
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Solution
The correct option is C The tennis ball suffers a greater change in momentum as compared with the lead ball. Change in the momentum = Final momentum - initial momentum
For lead ball, Δ→plead=0−m→v=−m→v For tennis ball, Δ→ptennis=−m→v−m→v=−2m→v i.e. tennis ball, suffers a greater change in momentum.