The body shown is constructed of uniform slender rod and consists of a ring of radius r...

The body shown is constructed of uniform slender rod and consists of a ring of radius r attached to a straight section of length 2r. The body pivots freely about a ball-and-socket joint at O. If the body is at rest in the vertical position shown and is given a slight nudge, compute its angular velocity ω after a 90° rotation about (a) axis A-A and (b) axis B-B.