Steve4Physics's latest activity
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SSteve4Physics replied to the thread Four L-shaped members: Mechanical Analysis Problem.Note that this is only justified because section DG is in equlibrium with only 2 forces acting on it. So: a) the 2 forces must have...
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SSteve4Physics replied to the thread Four L-shaped members: Mechanical Analysis Problem.I agree. And well done for using LaTeX! A couple of points: 1. You have assumed, without justification, that some reactions are at 45...
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SSteve4Physics reacted to jojosg's post in the thread Four L-shaped members: Mechanical Analysis Problem with
Like.
Ok I think I got it. ##\sum F_x = 0 : \quad A_x - B_x = -F \tag{1}## ##\sum F_y = 0 : \quad A_y + B_y = 0 \tag{2}## ##\sum M_A = 0 ... -
SSteve4Physics reacted to haruspex's post in the thread Four L-shaped members: Mechanical Analysis Problem with Like.
Very neat. Small typo: in your diagram under (1), you have -F at top right instead of F.
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SSteve4Physics replied to the thread Four L-shaped members: Mechanical Analysis Problem.The Post #1 question seems to have only 20 minutes (exam’) working time advised, so a quick method is needed. There is a fairly quick...
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SSteve4Physics replied to the thread Four L-shaped members: Mechanical Analysis Problem.Happy 2026 @haruspex! If B is pinned and A is on a horizontal track, I suspect this would happen: It satisfies the (intuitive)...
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SSteve4Physics reacted to Lnewqban's post in the thread Four L-shaped members: Mechanical Analysis Problem with Like.
Happy New Year, Steve! It seems to me that, due to joints C and G, if any of the pinned-supports is replaced by a simple horizontal...
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SSteve4Physics replied to the thread Four L-shaped members: Mechanical Analysis Problem.Happy New Year @Lnewqban! Yes, I see what you mean. So, for example, with A remaining pinned and with B free to move horizontally, the...
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Sdamn. this is hard to hear. @phinds was just a loved and core member for 15 years. Thank you so much for taking a bit of time to let us...
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SGood afternoon, This is not Paul, but rather his son Robert. I am very sad to write here that my dad passed away on Saturday...
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SSteve4Physics replied to the thread Four L-shaped members: Mechanical Analysis Problem.Isn’t the system statically indeterminate? [EDIT - No it isn't! See later posts.] Considering only external forces, it is trivial to...
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SSteve4Physics replied to the thread Truss analysis problem.@jojosg, there are a number of issues, so it's complicated to explain. But here is an attempt... I've written some of your equations...
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SSteve4Physics replied to the thread Truss analysis problem.I'm out for most of today but will take a look when I return.
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SSteve4Physics replied to the thread Truss analysis problem.You are on the right track but it looks like you have ignored some forces when expressing ##\Sigma F_x=0, ~\Sigma F_y=0## and ##\Sigma...
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SSteve4Physics replied to the thread Truss analysis problem.The 'Method of Sections' is a way around this. See Post #9 which is intended to start the OP solving the problem using this method.
