Question

A potter's wheel—a thick stone disk with a radius of 0.420m and a mass of 120kg—is freely rotating at 53.0rev/min. The potter can stop the wheel in 5.50s by pressing a wet rag against the rim and exerting a radially inward force of 79.4N. Calculate the effective coefficient of kinetic friction between the wheel and the rag.

Jul 2, 2016

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