Physics: Principles with Applications (7th Edition)

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

Chapter 6 - Work and Energy - Misconceptual Questions: 13

Answer

Choice A.

Work Step by Step

The velocity of the crate is constant, so the net force is zero, and the net (total) work done on the crate is zero. The normal force is perpendicular to the velocity and does no work. The force of friction opposes the direction of motion and does negative work. Your pushing force and the downhill component of gravity point in the direction of motion, and each do positive work. Because the total work is zero, the work done by friction cancels the positive work done by gravity and by you, so friction does the greatest magnitude of work on the crate.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.