A torque of 36.8 N. m is applied to an initially motionless wheel which rotates around a fixed axis. This torque is the result of a directed force combined with a friction force. As a result of the applied torque the angular speed of the wheel increases from 0 to 10.5 rad/s. After 5.80 s the directed force is removed, and the wheel comes to rest 59.4 s later. (a) What is the wheel's moment of inertia (in kg • m2)? kg - m2 (b) What is the magnitude of the torque caused by friction (in N- m)? N.m (c) From the time the directed force is initially applied, how many revolutions does the wheel go through? revolutions

Principles of Physics: A Calculus-Based Text
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ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
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Chapter10: Rotational Motion
Section: Chapter Questions
Problem 39P
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A torque of 36.8 N • m is applied to an initially motionless wheel which rotates around a fixed axis. This torque is the result of a directed force combined with a friction force. As a result of the applied torque the
angular speed of the wheel increases from 0 to 10.5 rad/s. After 5.80 s the directed force is removed, and the wheel comes to rest 59.4 s later.
(a) What is the wheel's moment of inertia (in kg · m2)?
kg • m2
(b) What is the magnitude of the torque caused by friction (in N• m)?
N. m
(c) From the time the directed force is initially applied, how many revolutions does the wheel go through?
revolutions
Transcribed Image Text:A torque of 36.8 N • m is applied to an initially motionless wheel which rotates around a fixed axis. This torque is the result of a directed force combined with a friction force. As a result of the applied torque the angular speed of the wheel increases from 0 to 10.5 rad/s. After 5.80 s the directed force is removed, and the wheel comes to rest 59.4 s later. (a) What is the wheel's moment of inertia (in kg · m2)? kg • m2 (b) What is the magnitude of the torque caused by friction (in N• m)? N. m (c) From the time the directed force is initially applied, how many revolutions does the wheel go through? revolutions
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