A uniform disk of mass 381 kg and radius 0.18 m is mounted on frictionless bearings so it can rotate freely around a vertical axis through its center (see the following figure). A cord is wrapped around he rim of the disk and pulled with a force of 10 N. 10 N (a) How much work (in J) has the force done at the instant the disk has completed two revolutions, starting from rest? (b) Determine the torque due to the force. (Enter the magnitude in N. m.) N.m Calculate the work (in J) done by this torque at the instant the disk has completed two revolutions. (c) What is the angular velocity (in rad/s) at that instant? (Enter the magnitude.) rad/s

A uniform disk of mass 381 kg and radius 0.18 m is mounted on frictionless bearings so it can rotate freely around a vertical axis through its center (see the following figure). A cord is wrapped around he rim of the disk and pulled with a force of 10 N. 10 N (a) How much work (in J) has the force done at the instant the disk has completed two revolutions, starting from rest? (b) Determine the torque due to the force. (Enter the magnitude in N. m.) N.m Calculate the work (in J) done by this torque at the instant the disk has completed two revolutions. (c) What is the angular velocity (in rad/s) at that instant? (Enter the magnitude.) rad/s

University Physics Volume 1

18th Edition

ISBN:9781938168277

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

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

Chapter10: Fixed-axis Rotation

Section: Chapter Questions

Problem 90P: A uniform cylindrical grinding wheel of mass 50.0 kg and diameter 1.0 m is turned on by an electric...

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