Does it though? It doesn't matter which sign convention you use, one will still be positive and one will still be negative which will cancel out to leave joint b in static equalibrium... right? if the 291 is negative then shouldn't the other two moments around that joint should be positive so...
I'm actually just learning about them myself so I could be wrong but I may be able to help. Firstly the equivalent resistance of parallel resistors isn't just the sum of resistances so that doesn't work because in a bridge you usually have two banks of resistors that are in series connected in...
Btw, I'm not sure if the MO here is to actually post in every bit of working out I did. If that's the case please let me know and I can scan them in, its about 4 pages odd though.
Hi Guys, I have a 2nd year structural analysis problem which I am hoping someone can help me with.
Homework Statement
T-shaped, indeterminate frame consisting of two members connected at a node in the middle with the bottom member joined by a fixed pin-joint and the top member connected...
I'm assuming that itll be the reaction forces and also the force in every member. One last question, would it be incorrect to take the sum of the moments around A or F seeing as how A is a pinjoint and F is a roller joint ans these supports can't have reaction moments?
yeah i think I've got it now, I just worked it out using the other section. I just used a series of simultaneous equations and plugged them into the graphics calculator and that's how we were taught. I guess a quicker way would be to plug them into a truss modeler or something anyway thanks for...
No I wasn't aware that you could do that. Would that sort-of be equivalent to using the section on the other side of the cut and then summing the moments about D? As in cutting along that same line however instead using the section that contains A (i.e. the left side of the cut) and using the...
yeah i didnt actually go to that either. basically 80% of the marks are going to be centroids, truss questions and shear force & bending moment type stuff with a few tidbits of 3d concurrent forces thrown in for good measure
Realistically and without the gift of foresight, I am a firm believer that in the long term the solution will be nuclear whether that is fission or fusion in some way form or another. That is unless someone decides to build a Dyson sphere somehow but that probably isn't going to happen.
Also I...
Hello all, first post.
I have a mechanics test coming up and a the lecturer gave a very strong hint that a question like this with a scissor truss will be on the exam so how would you go about solving a question like this (finding force in all members).
I worked out the reaction forces as...