Conceptual Physics (12th Edition)

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

Chapter 6 - Reading Check Questions (Comprehension): 14

Answer

When a quantity such as momentum is conserved, its magnitude before an event is the same as its magnitude after the event. In the case of a vector quantity (such as momentum), the direction is also unchanged before and after the event.

Work Step by Step

This is discussed on page 99.
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