Conceptual Physics (12th Edition)

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

Chapter 8 - Think and Explain: 86

Answer

If the object is moving in a circular path, no work is done on it because the centripetal force is centrally directed, and always perpendicular to its motion.

Work Step by Step

For work to be done, there must be a component of force along the direction of motion.
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