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    Basic Physics: Force and Friction

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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 halt in 2.40 seconds?

    (Please see attachment for diagram.)

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    Solution Summary

    The solution is given succinctly, step-by-step. It uses simple calculations to find the friction force required.