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# A potters wheel having a radius of 0.50 m and a moment of inertia of 12\ kg\cdot m^2 is rotating freely at 50 rev/min. The potter can stop the wheel i

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A potters wheel having a radius of 0.50 m and a moment of inertia of $$\displaystyle{12}\ {k}{g}\cdot{m}^{{2}}$$ is rotating freely at 50 rev/min. The potter can stop the wheel in 6.0s by pressing a wet rag against the rim and exerting a radially inward force of 70N. Find the effective coefficient of kinetic friction between the wheel and the wet rag.