Determine the force in each member of the truss and state if the members are in tension or...

Question

Determine the force in each member of the truss and state if the members are in tension or compression. Set P1=400 pound, P2= 300 Pound, p3 = 0 pound.

David · Accepted Answer

Determine the force in each member of the truss and state if the members are in tension or compression. Set P1=400 
pound, P2= 300 Pound, p3 = 0 pound.
Solution 
Free Body Diagram of the entire Truss is shown Below
Now from Moments we have  
Step - 1 
∑MA = 0 
= 300 x 10 + 0 x 20 – RD x Cos 300 x 30 = 0 
RD = 115.47lb 
∑FY  = 0 
= AY -100 – 200 – 0 + 115.

Determine the force in each member of the truss and state if the members are in tension or compression. Set P1=400 pound, P2= 300 Pound, p3 = 0 pound.

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