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## Main Question or Discussion Point

Just found this forum--hope there isn't a max post limit haha.

I have been a bit stumped on this, but when doing problems about deflection and axial loadings, I am confused when to use which equation.

I think I know that axial member need to be 2 force members, loaded only at the ends, and this means you can use

I guess my main question is where do I use which, what exactly is axial loading, and what is statically indeterminate mean does this make it unusable??

Thanks!

I have been a bit stumped on this, but when doing problems about deflection and axial loadings, I am confused when to use which equation.

I think I know that axial member need to be 2 force members, loaded only at the ends, and this means you can use

*δ=FL/AE. However*, I had a problem with two axial bars connected at two ends and it was made clear that I could not use the above equation, but had to use**σ=****δL/E.**

I guess my main question is where do I use which, what exactly is axial loading, and what is statically indeterminate mean does this make it unusable??

Thanks!