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 - Problems - Page 251: 55d

Answer

The system must have received some energy from another source, such as from an explosive device which added energy to the system.

Work Step by Step

Since the total kinetic energy of the system increased during the collision, the system must have received some energy from another source, such as from an explosive device which added energy to the system.
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