Physics: Principles with Applications (7th Edition)

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

Chapter 9 - Static Equilibrium; Elasticity and Fracture - Misconceptual Questions: 1

Answer

Choice D.

Work Step by Step

Consider the beam as a single object. Its weight acts downward, a distance L/4 left of the pivot. The woman’s weight acts downward, the same distance away, on the right side of the pivot. The two weights are equal, because they have the same size lever arm, and produce torques that cancel.
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