A circular disk rotates on a bearing at point A, and has a string BCD attached to it. Th...

A circular disk rotates on a bearing at point A, and has a string BCD attached to it. The pulley at C is frictionless, and the string supports a weight W = 10 lb. Determine the moment of the force in segment BC of the string about point A for any position of the disk where , and plot the moment versus θ. Neglect the size of the pulley.