A potter's wheel (a thick stone disk with radius 0.45 m and mass 85 kg) is...

A potter's wheel (a thick stone disk with radius 0.45 m and mass 85 kg) is freely rotating at 52 rev/min. The potter can stop the wheel in 6.3 seconds by pressing a wet rag against the rim and exerting a radially inward force of 85 N. What is the coefficient of kinetic friction between the rag and the wheel?

The Correct answer is 0.19 please explain and show in why?

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Expert Solution

Note: whiling writing the formula of moment of inertia of the disc about its rotation axis, I have written ''coming out of the page from point O'', in the bracket. moment of inertia has no direction. Here, I wanted to the axis about which the moment of inertia is to be measured. It is going through the point O and perpendicular to the plane of paper. So please ignore the part ''coming out of the page from point O'', which I have written in the bracket.

genius_generous answered 1 year ago

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