T F a a 750 lb 1-38. The small block has a thickness of 5 mm. If the stress distribution at the support developed by the load varies as shown, determine the force F applied to the block, and the distance d to where it is applied. 180 mm 120 mm 60 min 1-46. The two steel members are joined together using a 60 scarf weld. Determine the average normal and average shear stress resisted in the plane of the weld. 8 kN ---25 mam 8 kN 60 MPa 40 MPa 1-81. The joint is fastened together using two bolts. Determine the required diameter of the bolts if the failure shear stress for the bolts is Tau 350 MPa. Use a factor of safety for shear of F.S. = 2.5. = 60 30 mm Prob. 1-46 40 kN 40 kN 80 kN 30 mm 30 mm