Determine the vertical displacement of joint C.  The length, L, of trusses AC, BC is 1,000 mm. The applied force at joint C, is 9.5 kN. The cross-sectional area of both trusses, A, is 370 mm2. The elastic modulus of truss AC, E1, is 115 GPa. The elastic modulus of truss BC, E2, is 155 GPa.

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

A pin-jointed truss ABC shown below consists of two links AB and BC. These links are 6 mm thick and 20 mm wide as shown. There are support brackets at A and C. All pins are 12 mm in diameter and a vertical force, P = 9 kN is applied at pin B as shown. The angle 0 =38 deg. and the angle ẞ = 0 + 20 deg. The normal stress in link AB is (The result is accurate to one decimal place, in the unit MPa. Please write down only the value of your final result) · 12mm 9 20mm -1.0m⋅ B

The members of the truss shown have equal cross-sectional areas A = 400 mm2. The suspended mass is m = 3400 kg. What is the normal stress in the member DE? Answer in MPa and use two decimals places.