Forces in Trusses: Tips for Finding Forces in Members

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To find forces in truss members, it is crucial to analyze the reaction forces at joints accurately. The force Ay, the y-component of the reaction force at point A, is indeed equal to the force in member AE. However, the force in member EF cannot be assumed to equal Ex due to the presence of member BE at the joint, which also affects the force distribution. Understanding the contributions of all members framing into a joint is essential for accurate calculations. Proper analysis of all forces at each joint will lead to correct results in truss problems.
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Look at the bottom problem at this page:

http://physics.uwstout.edu/StatStr/statics/StatII/statp22t2.htm

When I have found the force Ay (the y-component of the reaction force at point A), does that in this case mean that the force in member AE is then equal to this? If so, then the force in member EF is equal to Ex, correct? Or?

Any tips appreciated...
 
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The first part is right about AE but you can't assume EF=Ex because there is also member BE framing into the joint you have to analyze.
 
Ah, yes. I've got it now, thanks haynewp!
 

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