Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 6 - Dynamics I: Motion Along a Line - Exercises and Problems: 25

Answer

The farmer is not able to move the pig.

Work Step by Step

In order to move the pig, the farmer must be able to overcome the maximum force of static friction. We can find the maximum force of static friction as; $F_f = mg~\mu_s$ $F_f = (120~kg)(9.80~m/s^2)(0.80)$ $F_f = 941~N$ Since the farmer's maximum force of 800 N is less than the maximum force of static friction, the farmer is not able to move the pig.
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