The 5.0 kg, 60-cm-diameter disk in FIGURE P12.72 rotates on an axle passing through one edge. The

Question:

The 5.0 kg, 60-cm-diameter disk in FIGURE P12.72 rotates on an axle passing through one edge. The axle is parallel to the floor. The cylinder is held with the center of mass at the same height as the axle, then released.
a. What is the cylinder€™s initial angular acceleration?
b. What is the cylinder€™s angular velocity when it is directly below the axle?

60 cm Axle FIGURE P12.72