Point Particle System Reassessment: Chapter 9 Problem 44
A string is wrapped around a uniform disk of mass M=1.2kg and radius R=.11m. Attached to the disk are four low-mass rods of radius b=.14m, each with a small mass of m=.4kg at the end. The device is initially at rest on a nearly frictionless surface. Then you pull the string with a constant force F=21N. At the instant that the center of the disk has moved a distance .026m, a length .092m of string has unwound. (a) At this instant, what is the speed of the center of the apparatus? (b) At this instant, what is the angular speed of the apparatus?
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