9. The rigid bar AB is supported by two rods made of the same material. The bar is initially horizontal before the load P is applied. Neglect the weight of the bar. Calculate the distance "x" so that the bar remains horizontal. Answer: x = 3 ft L= 3 ft A = 0.2 in.² L=2 ft A = 0.4 in.2 A 12 ft

If load P = 22.9 kips, determine the normal force in bar (1). D P A 6 ft 51.9 kips 44.8 kips 27.3 kips 38.2 kips O 40.4 kips B (1) 4 ft

Ra=102lb, Ma=1020 ft*lb, Rc=Rd=199lb

7 ft 5 ft The assembly shown above includes column AB, which has the following properties: Pinned (top and bottom) for buckling about x-axis Free at top and fixed at bottom for buckling about y-axis Circular cross-section with 8-inch diameter E = 10000 ksi Which of the following is closest to the critical buckling force of column AB? O Per = 269 kip O Per = 1080 kip O Per = 538 kip O Per = 135 kip

1,200 N-m 4,500 N-m 2,800 N-m 500 N-m (3) 0.70 m 1.80 m 0.70 m Complete the torsion diagram of rod ABCD loaded as shown by dragging the components and filling in the values. T (kNm) A D B 1700 4500 500 -1700 -1200 2800 1600 -2300 -4500 4000 2300 3300 -2800 -3300 1200 -500 -4000 -1600

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

a b c d F   5 m     1.5 m     2.1 m     2.4 m     26 kN   The structure above is subjected to a load at point C. Using the table below, determine the forces acting at the support pins and at pin B on member ABC. Forces: (Denote tension forces with positive values; compressive forces with negative values.) FAX  = ? FAY = ?

This cylinder support has a diameter of 64mm, modulus of Elasticity of E = 200GPa. It is fixed at point A and point C. The support at A is concrete, so we know it is rigid. The support at C is considered rigid only if the reaction Force at C does not exceed 150kN. The heights/lengths are H_AC = 5.6m and H_AB = 2.6m. HAC A с B HAB

The bars AB, AC, and AD are pinned together as shown in the Horizontal movement of the pin at A is prevented by the rigid horizontal strut AE. Calculate the axial force in the strut caused by the 10-kip load. For each steel bar, A = 0.3 in.2 and E = 29 x 106 psi. For the aluminum bar, A = 0.6 in.2 and E = 10 x 106 psi.