A mechanism for pushing small boxes from an assembly line onto a conveyor belt, repeated from Prob. 5/89, is shown with arm OD and crank CB in their vertical positions. For the configuration shown, crank CB has a constant clockwise angular velocity of π rad/s. Determine the acceleration of E.

D. 200 mm 400 mm E 600 mm B 50 mm 200 mm 100 mm 100 200 mm mm