Physics (10th Edition)

Published by Wiley
ISBN 10: 1118486897
ISBN 13: 978-1-11848-689-4

Chapter 7 - Impulse and Momentum - Focus On Concepts - Page 191: 15


c) is correct.

Work Step by Step

Because there is no external force acting on the system, total vertical momentum is conserved, so $$p_{01, y}+p_{02, y}=p_{f1, y}+p_{f2, y}$$ We have $p_{01, y}=p_{02, y}=0$ and $p_{f1, y}=-5kg.m/s$ Therefore, $p_{f2, y}=5kg.m/s$. c) is correct.
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