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?

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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