3d static equilibrium problem4/11/2024 I definitely insist it should be pointing downward with the others, though) (There was also a time I tried to solve a less-simplified version of this problem, and the solution told me that B was actually pointing upward. Or maybe it's statically indeterminate, despite there only being 2 unknowns? Normally, these equations absolutely should be independent however, so I suspect there is some other kind of issue going on here-OR maybe they really are not independent, in which case I would like to know what makes them non-independent, and how I can make sure to avoid constructing such problems in the future. But this problem has kind of humbled me-maybe it's just a brain fart, or maybe I've constructed a problem that isn't actually possible to solve for reasons not currently apparent to me.Įvery time I try to solve this problem, attempting to solve the moment-sum equation combined with the force-sum equation eventually results in a trivial 0 = 0 identity, which means (by my understanding) that the equations were not truly independent. I feel that my statics foundation is pretty solid. ![]() I make free-body diagrams all the time and solve statics problems on a regular basis. I've actually been a practicing engineer for a few years now. ![]() But this has actually been giving me a lot of trouble, and I suspect it might be because I'm forgetting some sort of basic principle that I've perhaps been taking for granted up til now, which maybe happens to uniquely cause issues with this problem. A and C are known to be equal however, so there are really only 2 unknowns.Ī, B, and C are known to all be pointing downward.Īt first glance this looks like a pretty easy/standard statics problem.
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