(See attached file for full problem description with diagram and symbols)
3.) The 20-cm-diameter disk in the figure can rotate on an axle through its center.
What is the net torque about the axle? In Nm
4.) A 1.0 kg ball and a 2.0 kg ball are connected by a 1.0-m-long rigid, massless rod. The rod is rotating cw about its center of mass at 20 rpm.
What torque will bring the balls to a halt in 5.0 s? in Nm
Four problems related to rotational motion are solved.