The 0.2-kg pin P is constrained to move in the smooth curved slot, which is defined by the lemniscate r = (0.6 cos2 theta) m. Its motion is controlled by the rotation of the slotted arm OA which has a constant clockwise angular velocity of theta = -3 rad/s. Determine the force arm oa exerts on the pin p when θ = 0∘. motion is in the vertical plane.