Conceptual Physics (12th Edition)

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

Chapter 8 - Think and Discuss: 103

Answer

For mechanical equilibrium, the sum of the forces on an object equals zero, and the sum of the torques must also be zero.

Work Step by Step

This is discussed on page 153, in the summary of terms.
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