Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 8 - Rotational Motion - Problems: 63


The final angular speed is half of the initial angular speed.

Work Step by Step

There is no net external torque on the system, so the net angular momentum is conserved. The two disks have the same angular velocity at the end. $$L_i=L_f$$ $$I \omega_i + I(0)=2I \omega_f$$ $$\omega_f=\frac{1}{2}\omega_i$$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.