Question: 6. The 8.0 kg, 80-cm-diameter disk in figure below is spinning at 800 rpm. How much friction force must the brake apply to the rim

6. The 8.0 kg, 80-cm-diameter disk in figure below is spinning at 800 rpm. How much friction force must the brake apply to the rim to bring the disk to a stop in 8.0 s? Brake

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