A 20 mm diameter brass rod and a 25 mm diameter aluminium rod are rigidly joined together at a point (2) and each is rigidly attached to fixed walls at ends. A torque of T = 600 N m is applied at point (2). Knowing the following ( Brass: G = 40 GPa , Aluminium: G = 25 GPa ):
1. What is the torque in the brass rod?
2. What is the maximum shear stress in the brass rod?
3. What is the angle of twist at point (2)?