haruspex's latest activity
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haruspex replied to the thread Electric potential due to shell containing a charge at an offset outside.Consider a small patch of the inner surface. If it has charge ##\Delta Q##, what potential does that produce at A? You can use the... -
haruspex replied to the thread Electric potential due to shell containing a charge at an offset outside.Can we argue that all the field lines from the point charge must terminate at the inner surface? We need that argument anyway in order...
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haruspex replied to the thread Engineering Enumeration vs Bisection Strategy.Your reasoning is correct for the second part and I agree with your answer. It might shed light on the problem, possibly leading to a...
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haruspex replied to the thread Working out the accelerations in a double Atwood pulley system.You can use any frame of reference you like as long as you are consistent and include "fictitious" forces as appropriate.
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haruspex replied to the thread Charge inside nested spheres.You wrote R3-R1 both times. What did you mean to write? I am unable to comment without seeing your whole solution. Please post a...
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haruspex replied to the thread Four L-shaped members: Mechanical Analysis Problem.Very neat. Small typo: in your diagram under (1), you have -F at top right instead of F.
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haruspex reacted to Steve4Physics's post in the thread Four L-shaped members: Mechanical Analysis Problem with
Like.
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... -
haruspex replied to the thread Four L-shaped members: Mechanical Analysis Problem.Ah, yes, I missed that. But not if B is pinned and A is free, right?, because F acts to the right. So does this mean the two...
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haruspex 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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haruspex replied to the thread Pressure difference between two points in a tapered pipe.You are missing the point. There is an error in the algebra. Think about that again.
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haruspex reacted to Steve4Physics's post in the thread Four L-shaped members: Mechanical Analysis Problem with Like.
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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haruspex replied to the thread Four L-shaped members: Mechanical Analysis Problem.It says they are pin connected together. I agree the diagram is unclear though.
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haruspex replied to the thread Four L-shaped members: Mechanical Analysis Problem.Wrong.
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haruspex replied to the thread Four L-shaped members: Mechanical Analysis Problem.I'll fix up your LaTeX by replacing each occurrence of [ tex ] and [ \ tex ] with a double #. It is clearly not valid to conclude that...
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haruspex replied to the thread Four L-shaped members: Mechanical Analysis Problem.In the diagram, F is applied to GE, so would not feature in any equation specific to ACDG. Please post your equations.