A rod has a circular cross section with a diameter of 2 in. It is subjected to

Question:

A rod has a circular cross section with a diameter of 2 in. It is subjected to a torque of 12 kip · in. and a bending moment M. The greater principal stress at the point of maximum flexural stress is 15 ksi. Determine the magnitude of the bending moment.

12 kip-in.