A potter's wheel of radius 0.50 m and mass 100.0 kg is freely rotating at 5.2 rad/s. The potter can stop the wheel in 6.0 s by pressing a wet rag against the rim. To find moment of inertia, use I=\frac{mr^2}{2}I = m r 2 2 a. What is the angular acceleration of the wheel?

b. How much torque does the potter apply to the wheel?