Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 9 - Center of Mass and Linear Momentum - Questions - Page 246: 9a

Answer

One of the bodies was initially stationary.

Work Step by Step

Since the line segment marked with a number 1 is horizontal, it shows that one body stayed at the same position before the collision. Therefore, one of the bodies was initially stationary.
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