A structure (Figure P5.51) is made by welding a circular cross section steel shaft (E = 20...

A structure (Figure P5.51) is made by welding a circular cross section steel shaft (E = 200 GPa and G = 77.5 GPa), of length 1.2 m and diameter 60 mm, to a rectangular cross section steel beam of length 1.5 m and cross-section dimensions 70 mm by 30 mm. A torque T0 = 2.50 kN • m is applied to the free end of the shaft as shown. Determine the rotation of the free end of the shaft.

FIGURE P5.51