A string is wrapped around a uniform disk of mass M = 2.2 kg and radius R = 0.1 m. (Recall that the moment of inertia of a uniform disk is (1/2) MR2.)
A string is wrapped around a uniform disk of mass M = 2.2 kg and radius R = 0.1 m. (Recall that the moment of inertia of a uniform disk is (1/2) MR2.) Attached to the disk are four low-mass rods of radius b = 0.13 m, each with a small mass m = 0.7 kg at the end. The device is initially at rest on a nearly frictionless surface. Then you pull the string with a constant force F = 22 N. At the instant when the center of the disk has moved a distance d = 0.044 m, a length w = 0.038 m of string has unwound off the disk.
(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?
(c) You keep pulling with constant force 22 N for an additional 0.038 s. Now what is the angular speed of the apparatus?
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A string is wrapped around a uniform disk of mass M = 2.2 kg and radius R = 0.1 m. (Recall that the moment of inertia of a uniform disk is (1/2) MR2.)
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the figure). This is like a yo-yo; nothing but the vertical string
touches the object. When your hand is a height y0= 0.24 m above the
floor,...
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