Determine the vertical displacement of joint C.  The length, L, of trusses AC, BC is 1,100 mm. The applied force at joint C, is 7.5 kN. The cross-sectional area of both trusses, A, is 400 mm2. The elastic modulus of truss AC, E1, is 145 GPa. The elastic modulus of truss BC, E2, is 175 GPa.

Problem 6.42 Consider the truss (Figure 1). Suppose that F = 14.5 kN Figure 1 4 kN of 1 6 kN H B m G 2 m 9 KN C -1.5 m 1.5 m 1.5 m 1.5 m 1 m D > 6 kN E Part A Determine the force in member BC. State if this member is in tension or compression. Express your answer to three significant figures and include the appropriate units. Enter negative value in the case of compression and positive value in the case of tension. FBC = Submit Part B FHC = D μA Submit Value My Answers Give Up Determine the force in member HC. State if this member is in tension or compression. Express your answer to three significant figures and include the appropriate units. Enter negative value in the case of compression and positive value in the case of tension. Units μA Value Units ? My Answers Give Up ? Part C Determine the force in member HG. State if this member is in tension or compression. Express your answer to three significant figures and include the appropriate units. Enter negative value in the case of…

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