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 - Problems: 4

Answer

46 kg.

Work Step by Step

The magnitude of the torque she exerts is her weight multiplied by the distance between her feet and the left support post. $$\tau = mgL$$ $$m=\frac{\tau}{gL}=\frac{1800 N \cdot m}{(9.8 m/s^2)(4.0m)}=46 kg$$
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