Essential University Physics: Volume 1 (4th Edition)

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

Chapter 10 - Exercises and Problems - Page 195: 84

Answer

8

Work Step by Step

We know that the mass is directly related to the rotational inertia, so doubling the mass doubles the rotational inertia. However, since the rotational inertia is directly related to the square of the radius, doubling the radius will increase the rotational inertia by a factor of 4. Using this, we have: $ 4 \times 2 = 8$
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