The 0.2 kg pin P is constrained to move in the smooth curved slot, which is defined by the lemniscate r = 0.6cos20 (m). Its motion is controlled by the rotation of slotted arm OA, which has a constant clockwise angular velocity of = -3 rad/s. Determine the force arm OA exerts on the pin P when 0 = 0. Motion is in the vertical plane. r = (0.6 cos 20) m