Answered: A 2.65-kg grinding wheel is in the form…

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotation Of A Rigid Object About A Fixed Axis

Section: Chapter Questions

Problem 31P: A uniform solid disk of radius R and mass M is free to rotate on a frictionless pivot through a...

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Question

A 2.65-kg grinding wheel is in the form of a solid cylinder of radius 0.100 m.

Part A
What constant torque will bring it from rest to an angular speed of 1200
rev/min in 2.5 s?
Express your answer with the appropriate units.

Part B
Through what angle has it turned during that time?

Part c.
Use equation
W=τz(θ2−θ1)=τzΔθ
to calculate the work done by the torque.
Express your answer with the appropriate units.

Part D
What is the grinding wheel’s kinetic energy when it is rotating at 1200
rev/min?
Express your answer with the appropriate units.

Part E
Compare your answer in part (D) to the result in part (C).
Compare your answer in part (D) to the result in part (C).
The results are the same.
The results are not the same.

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