Your calculations appear to state that Ay = Fy = 14 (kN?)J-dizzal said:Homework Statement
Determine the forces in members BC and CG. The forces are positive if in tension, negative if in compression.
Homework Equations
ΣF=0
ΣM=0
The Attempt at a Solution
im not sure what I am doing wrong here, i think it might be my angle θ?
I got 3.66N tension as my answer but its wrong, i just started trusses and not sure what I am doing wrong.
thank you sir.SteamKing said:
The method of sections is a technique used in structural analysis to determine the internal forces and reactions of a truss by isolating a specific section of the truss and analyzing it as a free body.
The method of sections is used when only a small portion of the truss needs to be analyzed, rather than the entire structure. It is also used when the reactions at supports are not known, and when the truss contains more than three unknown forces.
The internal forces (tension or compression) of a truss member can be determined using the equilibrium equations of forces and moments. By isolating a section of the truss and considering all the external and internal forces acting on it, the unknown forces can be solved for.
The method of sections is only applicable to truss structures that are statically determinate, meaning that the reactions and internal forces can be determined using equations of equilibrium. It also assumes that the truss is in a state of static equilibrium and that all the members are connected by ideal pins or hinges.
It is important to carefully select the section of the truss to be analyzed, as the results will only be accurate if the section is isolated properly. It is also helpful to use a scale drawing and label all the known and unknown forces to keep track of the equations used. Additionally, it is recommended to check the results by analyzing a different section of the truss to ensure accuracy.