Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 10 - Section 10.3 - Rotational Inertia and the Analog of Newton’s Law - Got It? - Page 174: 10.3

Answer

1) Decrease 2) Increase

Work Step by Step

Recall, rotational inertia is inversely related to the distance the mass is away the axis of rotation. Thus, in case 1), since the mass is closer, rotational inertia decreases, while in case 2), since the mass is further away, rotational inertia increases.
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