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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Transcribed Image Text:A 57.5-kg grindstone is a solid disk 0.6 m in diameter. You press an ax down
on the rim with a normal force of 164.9 N.
m
The coefficient of kinetic friction between the blade and the stone is 0.7, and
there is a constant friction torque of 9.5 N m between the axle of the stone
and its bearings. Another force is applied tangentially at the end of a crank
handle 0.5 m long to bring the stone from rest to 164.1 rev/min in 8.1 s.
After the grindstone attains an angular speed of 120 rev/min, what tangential
force at the end of the handle is needed to maintain a constant angular speed
of 120 rev>min?
*1 = 1/2 MR2
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