35. The figure below shows a shaft of 1.5-tn diameter loaded by a bending moment Mz = 5,000 lb ¦ in, a torque T = 8,0001b • in, and an axial tensile force N = 6,0001b. If the material is ductile with the yielding stress cry = 40,000psi, determine the safety factor using

(a) the maximum shear stress theory and

(b) the maximum distortion energy theory.

\.y M, T N

-U- ( V N