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: 90i

Answer

In experiment (a), experiment (c), and experiment (d), the frictional force is directed down the wall.

Work Step by Step

When the magnitude of $P$ directed up the wall is greater than the block's weight of $22~N$, then the frictional force is directed down the wall. In experiment (a), experiment (c), and experiment (d), the frictional force is directed down the wall.
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