Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 6 - Force and Motion-II - Problems - Page 147: 90g

Answer

In experiment (d) when the applied force up the wall is $P = 62~N$, the block will move up the wall.

Work Step by Step

We can find the maximum possible force of static friction: $F_f = (60~N)(0.55) = 33~N$ The block will move up the wall when the applied force $P$ directed up the wall is greater than the sum of the block's weight and $F_f$. We can find the sum of the block's weight and $F_f$: $mg+F_f = 22~N+33~N = 55~N$ In experiment (d) when the applied force up the wall is $P = 62~N$, the block will move up the wall.
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