Essential University Physics: Volume 1 (3rd Edition)

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

Chapter 10 - Exercises and Problems - Page 188: 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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