Answered: assuming negligi

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter11: Angular Momentum

Section: Chapter Questions

Problem 27P: A solid cylinder of radius 10.0 cm rolls down an incline with slipping. The angle of the incline is...

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Question

Suppose you exert a force of 180 N tangential to a 0.280 m radius 75.0 kg grindstone ( a solid disk)

a) what torque is exerted?

b) what is the angular acceleration assuming negligible opposition friction?

c) what is the angular acceleration if there is an opposing frictional force of 20.0 N exerted 1.50 cm from the axis?

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

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