Physics: Principles with Applications (7th Edition)

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

Chapter 8 - Rotational Motion - Misconceptual Questions: 4

Answer

Choice C.

Work Step by Step

Torque is the lever arm multiplied by the component of the force perpendicular to the arm. The force of 1000 N force has no lever arm and no torque because it acts at the pivot. The force of 800 N has no component perpendicular to the lever arm and also exerts zero torque. Of the three 500-N forces, choice C is totally perpendicular to the lever arm and is applied farthest from the pivot. It will be most effective at giving the board an angular acceleration.
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