Essential University Physics: Volume 1 (4th Edition)

Published by Pearson
ISBN 10: 0-134-98855-8
ISBN 13: 978-0-13498-855-9

Chapter 12 - Section 12.3 - Examples of Static Equilibrium - Got It? - Page 216: 12.3



Work Step by Step

The only guarantee is that there must be a frictional force on the floor. After all, she is pushing straight against the wall, so if there is not a frictional force on the floor, the net torques would not cancel to zero, and she would not be at static equilibrium.
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