A potter's wheel (a thick stone disk with radius 0.45 m and mass85 kg) is freely rotating at 52 rev/min. The potter can stop thewheel in 6.3 seconds by pressing a wet rag against the rim andexerting a radially inward force of 85 N. What is the coefficientof kinetic friction between the rag and the wheel?
The Correct answer is 0.19 please explain and show inwhy?
