7-34. The plate has a width of 0.5 m. If the stress distribution at the support varies as shown, determine the force P applied to the plate and the distance d to where it is applied. 4 m a = (15r") MPa- 30 MPa

7-30. The bars of the truss each have a cross-sectional area of 780 mm². Determine the average normal stress in each member due to the loading P = 40 kN. State whether the stress is tensile or compressive. a9m -1.2m -1.2 m- 0.75 P

1-103. The bar is supported by the pin. If the allowable tensile stress for the bar is (o)allow = 150 MPa, and the allowable shear stress for the pin is Tallow = 85 MPa, determine the diameter of the pin for which the load P will be a maximum. What is this maximum load? Assume the hole in the bar has the same diameter d as the pin. Take 1 = 6 mm and w = 50 mm.

*7-36. The pedestal has a triangular cross section as shown. If it is subjected to a compressive force of 2250 N, specify the x and y coordinates for the location of point P(x, y), where the load must be applied on the cross section, so that the average normal stress is uniform. Compute the stress and sketch its distribution acting on the cross section at a location removed from the point of load application. X 75 mm 300 mm 150 mm 2250 N Prob. 7-36 P(x,y) y

*7-56. The steel swivel bushing in the clevator control of an airplane is held in place using a nut and washer as shown in Fig. (a). Failure of the washer A can cause the push rod to separate as shown in Fig. (b). If the average shear stress is Tng = 145 MPa, determine the force F that must be applied to the bushing that will cause this to happen. The washer is 15 mm thick. 20 mm - (a) (b)

The plate has a width of 0.5 m. If the stress distribution at the support varies as shown, determine the force P applied to the plate and the distance d to where it is applied.

The 2-Mg concrete pipe has a center of mass at point G. If it is suspended from cables AB and AC, determine the diameter of cable AB so that the average normal stress in this cable is the same as in the 10-mm-diameter cable AC.

7-67. If the allowable shear stress for each of the 10-mm-diameter steel pins at A, B, and Cis Tllo - 90 MPa, and the allowable normal stress for the 13-mm-diameter rod is oalon - 150 MPa, determine the largest intensity w of the uniform distributed load that can be suspended from the beam. 1.2 m 0.3m

R7-5. Determine the average punching shear stress the circular shaft creates in the metal plate through section AC and BD. Also, what is the bearing stress developed on the surface of the plate under the shaft? 40 kN - 50 mm - Ti0 mm -60 mm -120 mm

Determine the maximum normal stress (in MPa) developed in the bar when it is subjected to a tension of P = 12 kN.