(1) Examine the truss in Figure 2 and identify zero-force members. (2) Reactions are given. Ax = 0, A, = 12 kN (↓), and Cy = 32 kN (†). Determine member forces FCJ, FFC, and FGH by any method. L A K G H J F B X 6 m X C 6 m D E 20 kN 12 m 8 m 12 m 5 m. K

In the following beams kB=? k (stiffness)

Y = 92 A = 9

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Q3 The truss ABC shown in the figure supports a horizontal load P-900 lb and a vertical load P2= 300 lb. Both bars have cross-sectional area A-2.4 in. and are made of steel with E-20 X 10 psi. (a) Determine the strain energy U, of the truss when the load P, acts alone (P2 -0). (b) Determine the strain energy U2 when the load P2 acts alone (P 0). (c) Determine the strain energy Uz when both loads act simultaneously. 30 B P =900 lb P2 300 lb 40 in.

3. For the truss shown in the figure for this question, members AB and CD shown in bold each have a weight of 2 N. 4 m IC Establish the force in members BC, E I 3. CG, DE, and GH. Ans. FBC = 8 N (tension) FCG = 1.67 N (compression) FDE = 0 FGH = 6.67 N (compression) %3D 5 N 2N 7 N %3D %3D

For the given truss, P = 3000N and Q = 1000N. see Figure3. Determine the reactions at the supports

From the given truss shown, FA = 150, FB = 200, and FC = 250 N. Compute the following. Specify whether the forces in each member are in tension or compression. a. find the reaction at C b. find the force in member AC c. find the force in member CD d. find the force in member AD

B F RK E G F1 F2 AC, CE, EG, GI, IK, BD, DF, FH, HJ = 12.5 m, AZ=15 m, ZB=6.25 mF_1= 60 kN, F_2 = 60 kN For the truss as shown and the loading indicated. Show the free body diagram for the joint: Olncluded in manual solution ONot made 1.Find the reactions. pe here to search

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