Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 12 - Exercises and Problems - Page 214: 15


(a)$\tau=(\frac{L}{2})mg$ (b)0 (c)$\tau=(\frac{L}{2})mg$

Work Step by Step

We know that (a) $\tau=r\times F$ $\implies \tau=(\frac{L}{2})mg$ (b) $\tau=r\times F$ $\implies \tau=(0)mg$ $\tau=0$ (c) $\tau=r\times F$ $\tau=-(\frac{L}{2})mg$
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