Answer
Matt comes closest.
Work Step by Step
I will change Matt's statement as "There are all kinds of forces acting on the book., but the upward forces balances the downward forces to prevent it from falling."
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)
by Knight, Randall D.
Published by
Pearson
ISBN 10:
0321740904
ISBN 13:
978-0-32174-090-8
Chapter 6 - Dynamics I: Motion Along a Line - Conceptual Questions - Page 160: 3
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