Conceptual Physics (12th Edition)

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

Chapter 19 - Think and Discuss: 89


Yes, it makes sense.

Work Step by Step

The restoring force in a pendulum is gravity. If the mass of the bob is, say, doubled, the force on it doubles, but the bob is twice as hard to accelerate, so the motion remains the same. This is the same argument that explains why all masses have the same freefall acceleration.
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