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Unformatted text preview: around a top. Then the string is pulled for 5.0 s. As a result, the disk and plate are rotated by a constant force of 0.60 N that is applied by the string tangentially to the edge of the disk. The resulting angular speed is 100 rad/s. a) What is the angular acceleration of the plate-disk system? Angular acceleration is the rate of change in angular velocity. We have = /t = 20 rad/s 2 b) What is the rotational inertia of the plate about the axle? Newtons 2 nd law yields I = = Fr I = Fr/ = 6 10-4 kgm 2 Since the system consists of the disk and the plate, the rotational inertia of the plate is I = I disk + I plate I plate = I (1/2)mr 2 = 5.2 10-4 kgm 2...
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This note was uploaded on 01/25/2011 for the course PHY 2048 taught by Professor Field during the Summer '08 term at University of Florida.
- Summer '08