College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 8 - Multiple-Choice Questions - Page 310: 10


The correct answer is: (e) $I$ and $K_{rot}$ only

Work Step by Step

No external torque acts on the diver, so the angular momentum $L$ remains constant. More of the mass is brought closer to the axis of rotation. This decreases the rotational inertia $I$ Since positive work was done by the diver to pull the legs inward, the system gains energy. Therefore, the rotational kinetic energy $K_{rot}$ increases. The correct answer is: (e) $I$ and $K_{rot}$ only
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