11-86. If the overhanging beam is made of wood having the allowable tensile and compressive stresses of (m). = 4 MPa and (atm)e = 5'MPa, determine the maximum concentrated force P that can applied at the free end. -130mm- 5 mm 200 mm 25 mm 25 mm

The truss is constructed from three aluminum alloy members, each having a cross-sectional area of A = 800 mm² and an elastic modulus of E= 70 GPa. Assume a = 3.4 m, b = 10.9 m, and c = 4.5 m. If the horizontal displacement of roller B must not exceed 6.4 mm calculate the maximum vertical load Pmax that can be supported by the truss. C L₂ a Answer: Pmax= P b KN B

The man has a mass of 100 kg and center of mass at G. If he holds himself in the position shown, determine the maximum tensile and compressive stress developed in the curved bar at section a–a. He is supported uniformly by twobars, each having a diameter of 25 mm. Assume the floor is smooth. Use the curved-beam formula to calculate the bending stress.