5. A machine operator suffered a high speed traumatic finger bone twisting fracture along a surface that is 45" to the axis T of the finger bone. The shear stress t in the bone associated with this is as shown. For simplicity consider the bone to be a solid cylindrical shaft of circular cross section with a 20 mm diameter. If the ultimate tensile stress for the bone is O 100 MPa (T) determine the torque in Nm that caused the fracture