Identify all the zero-force members in the two trusses shown below.

3. For the truss shown, draw the free body diagram for joints A, B, C, and D. Also, using equilibrium equations for ijust node B, find the force in member AB. 250 Ib A 30° 8 ft В 6 ft 6 ft

Calculate the force in member GH of the truss and indicate whether it is in tension or compression, using either method of joints or method of sections. Required: Draw the FBD(s) as needed for analysis-all equilibrium equations must correspond to a FBD that you have drawn. Make sure to clearly indicate which FBD your equation(s) correspond to. K J H 4 ft C - 3 ft 3 ft -- 3 ft- 3 ft-3 ft 1500 lb 1500 lb 1500 lb 1500 lb 1500 lb

Calculate the forces in all members of the trusses shown using the method of joints.