Small ball-bearing rollers mounted on the ends of the slender bar of mass m and length l...

Small ball-bearing rollers mounted on the ends of the slender bar of mass m and length l constrain the motion of the bar in the horizontal x-y slots. If a couple M is applied to the bar initially at rest at θ = 45°, determine the forces exerted on the rollers at A and B as the bar starts to move.