4. An electric motor rotating a grinding wheel at 150 rev/min is switched off. Assuming constant negative angular acceleration of magnitude 2.5 rad /s?, (a) how long does it take the wheel to stop? (b) Through how many radians does it turn during the time found in (a)?

4. An electric motor rotating a grinding wheel at 150 rev/min is switched off. Assuming constant negative angular acceleration of magnitude 2.5 rad /s?, (a) how long does it take the wheel to stop? (b) Through how many radians does it turn during the time found in (a)?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

4. An electric motor rotating a grinding
wheel at 150 rev/min is switched off.
Assuming constant negative angular
acceleration of magnitude 2.5 rad /s?,
(a) how long does it take the wheel to
stop? (b) Through how many radians
does it turn during the time found in
(a)?

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