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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

The two rigid objects shown in Figure 8.21 have the same mass, radius, and angular speed, each spinning around an axis through the center of its circular shape. If the same braking torque is applied to each, which takes longer to stop? (a) A (b) B (c) more information is needed

images

Figure 8.21 (Quick Quiz 8.3)

To determine
The time taken for the spinning objects to stop on application of same torque.

Explanation

The angular acceleration is given by,

α=τI

  • I is the moment of inertia.
  • τ is the applied torque.

Conclusion:

Moment of inertia of the hollow cylinder is greater than that of solid cylinder

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