Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 7 - Think and Explain: 91

Answer

Two objects with the same KE do not necessarily have the same momentum.

Work Step by Step

For example, a 9-kg ball moving at 1 m/s has the same KE, 9 J, as a 1-kg ball moving at 3 m/s. However, the momentum of the more massive object is larger. As another example, momentum is a vector, so identical objects moving at the same speed, but in different directions, will have the same KE, but different momentum vectors.
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