Answered: Figure P8.41

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter9: Linear Momentum And Collisions

Section: Chapter Questions

Problem 9.96CP: Review. A chain of length L and total mass M is released from rest with its lower end just touching...

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An approximate model for
a ceiling fan consists of a
cylindrical disk with four
thin rods extending from
the disk’s center, as in Figure
P8.41. The disk has mass
2.50 kg and radius 0.200 m.
Each rod has mass 0.850 kg
and is 0.750 m long. (a) Find
the ceiling fan’s moment of
inertia about a vertical axis through the disk’s center. (b) Friction
exerts a constant torque of magnitude 0.115 N ? m on the
fan as it rotates. Find the magnitude of the constant torque
provided by the fan’s motor if the fan starts from rest and takes
15.0 s and 18.5 full revolutions to reach its maximum speed.

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