Fundamentals of Physics Extended (10th Edition)

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

Chapter 11 - Rolling, Torque, and Angular Momentum - Problems - Page 323: 45c

Answer

When the man moved the bricks, this force did positive work on the system which increased the kinetic energy of the system.

Work Step by Step

In part (b), we found that the ratio of the new kinetic energy of the system to the original kinetic energy is $~~3$ When the man moved the bricks, this force did positive work on the system which increased the kinetic energy of the system.
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