College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 6 - Linear Momentum and Collisions - Learning Path Questions and Exercises - Multiple Choice Questions - Page 213: 12


(d) The change in momentum of the ball is $2mv$.

Work Step by Step

Initial momentum of the ball, $\vec{p_i}=m\vec v$ After the ball hits the wall and bounces back, its velocity is $-v$. Thus, final momentum, $\vec{p_f}=m(-\vec v)$. Change in momentum, $\vec{p_i}-\vec{p_f}=2m\vec v$.
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