*7-52. The beam is subjected to the loading shown, where P = 7 kN. Determine the average shear stress developed in the nails within region AB of the beam. The nails are located on each side of the beam and are spaced 100 mm apart. Each nail has a diameter of 5 mm. 13 kN C A B -2 m- -2 m 100 mm 30 mm 30 mm 150 mm 250 mm 30 mm 30 mm Prob. 7-52