Fundamentals of Physics Extended (10th Edition)

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

Chapter 8 - Potential Energy and Conservation of Energy - Questions: 11

Answer

-40 Joules.

Work Step by Step

The particle is traveling from (f) to (i) and ends at (j). In the first segment, the force does -20 Joules of work on the particle.In the second segment, the force also does -20 Joules of work. Although it is labeled as positive 20 Joules, the particle is traveling in the opposite direction, so the sign must be flipped. The total work is -40 Joules.
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