Extracted text: 3.6 Two forces, each of magnitude P, are applied to the wrench. The diameter of the steel shaft AB is 15 mm. Determine the largest allowable value of P if the shear stress in the shaft is not to exceed 120 MPa and its angle of twist is limited to 5°. Use G = 80 GPa for steel. 300 mm P B 500 mm A FIG. P3.6