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 - Search and Learn - Page 259: 4

Answer

Torque can only be produced by two types of forces when an axis is chosen about the point where the cable is attached to the beam: weight of the beam and vertical component of force due to the hinge.

Work Step by Step

Hence, the weight of the beam is downwards as it produces a counterclockwise torque. If we want the torque value to be zero, the vertical component of force due to the hinge should produce clockwise torque and that is why the point should be upward.
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