Essential University Physics: Volume 1 (4th Edition) Clone

Published by Pearson
ISBN 10: 0-134-98855-8
ISBN 13: 978-0-13498-855-9

Chapter 10 - For Thought and Discussion - Page 191: 7

Answer

The rotational kinetic energy causes the difference.

Work Step by Step

With the blade mounted, the kinetic rotational energy is much greater than when the blade is not mounted. We know that friction is the reason that the blade stops moving. The friction barely changes with the blade mounted. Thus, since the kinetic rotational energy is much higher with the blade, it will take much longer for all of that energy to dissipate.
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