A string is wrapped around a disk of mass m = 2.4 kg and radius R = 0.12 m. Starting from rest, you pull the string with a constant force F = 6 N along a nearly frictionless surface. At the instant when the center of the disk has moved a distance x = 0.16 m, your hand has moved a distance of d = 0.32 m. m = F d (a) At this instant, what is the speed of the center of mass of the disk? m/s Vcm (b) At this instant, how much rotational kinetic energy does the disk have relative to its center of mass? Krot = J

A string is wrapped around a disk of mass m = 2.4 kg and radius R = 0.12 m. Starting from rest, you pull the string with a constant force F = 6 N along a nearly frictionless surface. At the instant when the center of the disk has moved a distance x = 0.16 m, your hand has moved a distance of d = 0.32 m. m = F d (a) At this instant, what is the speed of the center of mass of the disk? m/s Vcm (b) At this instant, how much rotational kinetic energy does the disk have relative to its center of mass? Krot = J

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotational Motion

Section: Chapter Questions

Problem 78P: Review. A string is wound around a uniform disk of radius R and mass M. The disk is released from...

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