A 3-in.-radius drum is rigidly attached to a 5-in.-radius drum as shown.
One of the drums rolls without sliding on the surface shown, and a cord is
wound around the other drum. Knowing that at the instant shown end D of
the cord has a velocity of 8 in./s and an acceleration of 30 in./s2, both
directed to the left, determine the accelerations of Points A, B, and C of
the drums.