A milling operation was used to remove a portion of a solid bar of Problems square cross section. Knowing that a = 1.2 in., d = 0.8 in., and s all = 8 ksi, determine the magnitude P of the largest...

A milling operation was used to remove a portion of a solid bar of Problems square cross section. Knowing that a = 1.2 in., d = 0.8 in., and s_all
= 8 ksi, determine the magnitude P of the largest forces that can be safely applied at the centers of the ends of the bar.