2. The three bars shown in Figure Q2 are made of different materials ie. steel (bar A), aluminium (bar B) and brass (bar C). Each bar is subjected to a torque of T Nm. Given, the shear modulus, G of steel, aluminium and brass are equal to 80 GPa, 27 GPa, 35 GPa, respectively. i. Find the maximum torsional shear stress on each bar. Use the coefficients given in Table 1 for rectangular/ square bar. If the length of the steel (bar A) is equal to 2 m, calculate the angle of twist at the free end of the steel bar when subjected to T Nm torque. Find the length of the remaining two bars for the same angle of twist in bar A. X1 mm X1mm