I keep not understanding the last part - if you are doing the moment of inertia around B, why is the distance of EF = 4? Why isn't it a straight line to B (i.e. the length of BE)? [Good video though, thanks]
Hi Adam, anytime the force is in the Y-direction the perpendicular distance has to be in the x-direction. In this case, the distance from force EF to point B will be the width of the truss - 4 meters. Check out this figure for the sake of having a visual representation drive.google.com/file/d/1ehyW9_T-E8tN2ozs92jynyB3uVWwsrkO/view?usp=sharing
This is the best lecturer on youtube.
I keep not understanding the last part - if you are doing the moment of inertia around B, why is the distance of EF = 4? Why isn't it a straight line to B (i.e. the length of BE)? [Good video though, thanks]
Hi Adam, anytime the force is in the Y-direction the perpendicular distance has to be in the x-direction. In this case, the distance from force EF to point B will be the width of the truss - 4 meters. Check out this figure for the sake of having a visual representation drive.google.com/file/d/1ehyW9_T-E8tN2ozs92jynyB3uVWwsrkO/view?usp=sharing
how similar are your questions to that of the fe exam???
Older videos I have are good to cover for the basics. But newer videos are more similar to real FE problems you may see.
The second half is completely wrong. just ignore
Show me your work . Or explain