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 9 - Work and Kinetic Energy - Conceptual Questions: 10

Answer

The work done on the sprinter is positive.

Work Step by Step

The force of friction from the ground acts on the sprinter in the same direction as the sprinter's displacement. Therefore, the work done on the sprinter is positive. Also, we can see that the sprinter's kinetic energy increases while the potential energy remains essentially the same. Therefore, the work done on the sprinter is positive.
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