Motion of link ABC is controlled by the horizontal movement of the piston rod of the hyd...

Motion of link ABC is controlled by the horizontal movement of the piston rod of the hydraulic cylinder D and by the vertical guide for the pinned slider at B. For the instant when θ = 45°, the piston rod is retracting at the constant rate v_C = 0.6 ft /sec. Determine the acceleration of point A for this instant.