7th Edition

ISBN: 9780135902738

Author: Nagle

Publisher: PEARSON

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Chapter 3.4, Problem 17E

In Problem $16$ , let $I = 50$ kg-m² and the retarding torque be $5 ω$ N-m. If the motor is turned off with the angular velocity at $225$ rad/sec, determine how long it will take for the flywheel to come to rest.

16. Find the equation for the angular velocity $ω$ in Problem $15$ , assuming that the retarding torque is proportional to $ω$ .

15. A rotating flywheel is being turned by a motor that exerts a constant torque $T$ (see Figure $3.10$ ). A retarding torque due to friction is proportional to the angular velocity $ω$ . If the moment of inertia of the flywheel is $I$ and its initial angular velocity is $ω 0$ , find the equation for the angular velocity $ω$ as a function of time. [Hint: Use Newton’s second law for rotational motion, that is, moment of inertia $×$ angular acceleration $=$ sum of torques.]

Chapter 3.4, Problem 17E, In Problem 16, let I=50 kg-m2 and the retarding torque be 5 N-m. If the motor is turned off with the

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Chapter 3.4, Problem 16E

Chapter 3.4, Problem 18E

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Solution Summary: The author explains Newton's second law for rotational motion, that is, moment of inertia times angular acceleration = sum of torques.

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