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 - Page 201: 5d

Answer

The blocks total mechanical energy remains the same from point A to point C. Total mechanical energy starts to decrease in region CD.

Work Step by Step

From A to C, all the forces are balanced so no energy is being added or taken away; its just being shifted. Once a friction force is added, mechanical energy starts to get removed by the force.
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