Conceptual Physics (12th Edition)

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

Chapter 2 - Think and Explain: 77

Answer

The forces must be equal in magnitude, but oppositely directed.

Work Step by Step

An object in dynamic equilibrium has no net force acting on it. This is discussed on page 32. If only two forces act on this object, they must be equal and opposite, canceling each other, to make the net force equal 0.
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