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The 3.20kg, 38.0cm diameter disk in the figure is spinning at 350 rpm. How much friction force must the brake apply to the rim to bring the disk to a...

The 3.20kg, 38.0cm diameter disk in the figure is spinning at 350 rpm.
How much friction force must the brake apply to the rim to bring the disk to a halt in 2.40 seconds?
(PLEASE SEE ATTACHMENT FOR DIAGRAM)

Problem 13.69
The 3.20-kg, 38.0-cm diameter disk in the figure is spinning at 350 rpm.
How much friction force must the brake apply to the rim to bring the
disk to a halt in 2.40 seconds?

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