University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 7 - Potential Energy and Energy Conservation - Problems - Exercises - Page 230: 7.27


(a) $W = -5.4~J$ (b) $W = -5.4~J$ (c) $W_{total} = -10.8~J$ (d) The friction force is nonconservative.

Work Step by Step

(a) $W = -F_f~d$ $W = -(1.8~N)(3.0~m)$ $W = -5.4~J$ (b) $W = -F_f~d$ $W = -(1.8~N)(3.0~m)$ $W = -5.4~J$ (c) $W_{total} = -5.4~J - 5.4~J$ $W_{total} = -10.8~J$ (d) I would say that the friction force is nonconservative. The starting point and ending point of the book's journey are the same point but the total work done on the book by the friction force is not zero. Therefore, the friction force is nonconservative.
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.