Rod ABD is guided by wheels at A and B that roll in horizontal and vertical tracks. Knowing that at the instant b = 60° and the velocity of wheel B is 40 in./s downward, determine (a) the angular...

Rod ABD is guided by wheels at A and B that roll in horizontal and vertical tracks. Knowing that at the instant b = 60° and the velocity of wheel B is 40 in./s downward, determine (a) the angular velocity of the rod, (b) the velocity of point D.