A potter's wheel - thick stone disk of radius 0.55 m and mass 75 kg is freely rotating at 58 rev/min. The potter can stop the wheel by pressing a wet rag against the rim and exerting a radially inward force of 79 N. The effective coefficient of kinetic friction between the wheel and the rag is 0.442. F a) What is the frictional force acting on the outside edge of the wheel? b) What is the torque due to the frictional force acting about the axis at the center of the wheel? c) What is the moment of inertia of the wheel? (in kgm) d) What is the angular acceleration of the wheel while it is stopping? (in rad/s) e) How long does it take to stop?