Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 5 - Circular Motion; Gravitation - Misconceptual Questions: 12

Answer

Choice D.

Work Step by Step

The penny is still moving in a circle, so there is a centripetal force toward the center of the turntable. However, the penny is also slowing down, so it feels a force directed opposite to its instantaneous velocity, pointing down the page/screen. The two forces add together to give a net force as shown in Choice D.
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