A disk has mass M = 1.0 kg and radius, R = 0.3 m is free to rotate about a fixed axle through its center. Since the axle is fixed, the center of mass of the disk does not move. The disk is initially not rotating. A student wraps a string 5 times around the perimeter of the disk and then pulls the string with a constant force of F = 2.0 N, as shown in the figure below. F= 2N < R=0.3m I=mr² The student pulls on the string until it is completely unwound, and the string does not slip on the disk as it is pulled. After the string has unwound, what is the angular speed of the disk w : OA. W = 54.9 radians/sec OB. w = 32.8 radians/sec O . 29 radians/sec w = 17.6 radians/sec O E. W = 6.3 radians/sec
A disk has mass M = 1.0 kg and radius, R = 0.3 m is free to rotate about a fixed axle through its center. Since the axle is fixed, the center of mass of the disk does not move. The disk is initially not rotating. A student wraps a string 5 times around the perimeter of the disk and then pulls the string with a constant force of F = 2.0 N, as shown in the figure below. F= 2N < R=0.3m I=mr² The student pulls on the string until it is completely unwound, and the string does not slip on the disk as it is pulled. After the string has unwound, what is the angular speed of the disk w : OA. W = 54.9 radians/sec OB. w = 32.8 radians/sec O . 29 radians/sec w = 17.6 radians/sec O E. W = 6.3 radians/sec
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:A disk has mass M = 1.0 kg and radius, R = 0.3 m is free to rotate about a fixed axle
through its center. Since the axle is fixed, the center of mass of the disk does not move.
The disk is initially not rotating. A student wraps a string 5 times around the perimeter of
the disk and then pulls the string with a constant force of F = 2.0 N, as shown in the
figure below.
F= 2N <
R=0.3m
I=mr²
The student pulls on the string until it is completely unwound, and the string does not slip on the disk
as it is pulled. After the string has unwound, what is the angular speed of the disk w :
OA.
W = 54.9 radians/sec
OB.
w = 32.8 radians/sec
O .
29 radians/sec
w = 17.6 radians/sec
O E.
W =
6.3 radians/sec
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