Conceptual Physics (12th Edition)

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

Chapter 4 - Think and Explain - Page 71-72: 95

Answer

The metal sphere will be in dynamic equilibrium if the net force on it equals zero. This happens when it reaches terminal speed, and the downward gravitational force is equal and opposite to the fluid drag, which is directed upward.

Work Step by Step

This is discussed on pages 65-66.
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