12_P49InstructorSolution

12_P49InstructorSolution - 12.49 Model The disk is a...

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12.49. Model: The disk is a rotating rigid body. Visualize: Please refer to Figure EX12.49. Solve: From Table 12.2, the moment of inertial of the disk about its center is 2 2 4 2 1 1 (2.0 kg)(0.020 m) 4.0 10 kg m 2 2 I MR = = = × The angular velocity ω is 600 rpm 600 2 /60 rad/s 20 rad/s. π π = × = Thus, 4 2 (4.0 10
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