A centrifuge rotor rotating at 10,000 rpm about an axis through its center of mass is shut off and eventually brought to rest by a frictional torque of magnitude 1.20 N.m. If the rotor has a mass of 4.80 kg and if it can be approximated as a uniform disk of radius 7.10 cm, then (a) what is the moment of inertia of the rotor about an axis through its center of mass? (b) What is the magnitude of the angular acceleration of the rotor? (c) Through how many revolutions will the rotor turn before coming to rest, and how long will it take? Include a diagram of the situation.
A centrifuge rotor rotating at 10,000 rpm about an axis through its center of mass is shut off and eventually brought to rest by a frictional torque of magnitude 1.20 N.m. If the rotor has a mass of 4.80 kg and if it can be approximated as a uniform disk of radius 7.10 cm, then (a) what is the moment of inertia of the rotor about an axis through its center of mass? (b) What is the magnitude of the angular acceleration of the rotor? (c) Through how many revolutions will the rotor turn before coming to rest, and how long will it take? Include a diagram of the situation.
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter10: Fixed-axis Rotation
Section: Chapter Questions
Problem 63P: A system consists of a disk of mass 2.0 kg and radius 50 cm upon which is mounted an annular...
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