Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Published by Pearson
ISBN 10: 0321740904
ISBN 13: 978-0-32174-090-8

Chapter 12 - Rotation of a Rigid Body - Exercises and Problems - Page 349: 29


No, the object is not in equilibrium.

Work Step by Step

We can calculate the torque about an axis of rotation perpendicular to the left end of the rod. Note that the 40-N force exerts a torque of zero about this axis. $\tau = r_1\times F_1+r_2\times F_2$ $\tau = -(2.0~m)(100~N)+(3.0~m)(60~N)$ $\tau = -20~N~m$ Since the torque is non-zero, the object is not in equilibrium.
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