Problem 3. (20 points) A disk has mass
Mand radius
R. The disk can rotate freely about a horizontal bar. A mass
mis wrapped around the disk and hangs below it, as shown below. Note that the moment of inertia for a solid disk is
I=(1)/(2)MR^(2). Part (a) Draw separate, qualitatively correct free body diagrams for the disk and the hanging mass. (6 points)