A 100 N m torque (clockwise as viewed from end D) is applied to the gear shaft system consisting of solid circular shafts. Both shafts have diameter d= 20 mm and are made from steel with a modulus of rigidity G= 75 GPa . The shafts are free to rotate within their bearings, but shaft AB is rigidly fixed to the wall at A. Assume that the gears are rigid.
What is the angle of twist of point C relative to A?
Report a positive answer for a counter clockwise rotation and a negative answer for clockwise rotation.