Ultimate shear stress of pins = 750 MPa Ultimate normal stress of truss members = 250 MPa Factor of Safety = 2.5 Determine the minimum allowable diameter for members BE and DE. Determine the minimum allowable diameter for pins A and C (both pins are in double shear). YOU MUST DRAW A CLEAR AND COMPLETE FREE-BODY DIAGRAM 150 kN 0.9 m A B 75 kN C m + -1.2 m- D -1.2 m- m→ E

The two vertical steel [E = 200 GPa] rods that support rigid bar ABCD are initially free of stress. Rod (1) has an area of A1 = 410 mm2 and a length of L1 = 3.2 m. Rod (2) has an area of A2 = 355 mm2 and a length of L2 = 1.3 m. Assume dimensions of a = 3.4 m, b = 1.2 m, and c = 1.5 m. After a load of P = 50 kN is applied to the rigid bar at D, determine: (a) the normal stresses in rods (1) and (2) (b) the magnitude of the downward deflection of the rigid bar at D. y,v (2) L2 a B C D x,u Rigid bar |(1) Answer: (a) o1 = i MPa 02 = i MPa (b) VD = i mm

Please help on the 3 questions in the photo