The two solid steel shafts are coupled together using the meshed gears. Determine the angle of twist of end A of shaft AB when the torque 60 N-m is applied. Take G to be 60 GPa. Shaft AB is free to rotate within bearings E and F, whereas shaft DC is fixed at D. Each shaft has a diameter of 40 mm. 90 mm 1.5 m T= 60 N-m E B 2 m 180 mm