D Question 2 5 pts A 6-in long solid circular shaft is subjected to a vertical load of 600 lbf and a torque of 4750 in-lbf at the free end. The beam has a circular cross section, with a diameter of 0.875 in. 600 lbf 0.875 in 4750 in-lbf Determine the second principal stress, 2, at point A, in psi. Take Ishaft =0.028774 in4, and Jshaft = 0.057548 in4 17,941