haruspex's latest activity
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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... -
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.
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haruspex replied to the thread Four L-shaped members: Mechanical Analysis Problem.You are missing a force at D on ADC. Likewise at E on CEB. In your moment sums, you need to be clear on the system you are...
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haruspex replied to the thread Distance between a Clock's hands when the distance is increasing most rapidly.Several things. Velocity is a vector. What does it mean to say a velocity is at its maximum? Ok, we can say that its magnitude is at...
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haruspex replied to the thread Magnitude of buoyant force in fluids of different densities.That's a different matter; the discussion was confusion between mass as an object and mass as a property. English is replete with puns...
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haruspex replied to the thread Magnitude of buoyant force in fluids of different densities.Quite, because those velocities represent available choices and it is reasonable to rank choices based on the outcomes. What makes the...
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haruspex reacted to renormalize's post in the thread Magnitude of buoyant force in fluids of different densities with Like.
But elementary physics texts regularly use shorthand terms like "point mass" (not "point object with mass") and "point charge" (not...
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haruspex replied to the thread Magnitude of buoyant force in fluids of different densities.That would have been clearer, yes. But consider.. 1. "Cars of velocities v1 > v2 > v3 are driven from A to B. Rank the cars in order...
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haruspex replied to the thread Magnitude of buoyant force in fluids of different densities.The wording is awkward but not actually wrong. It means rank the fluids according to the buoyant forces they are exerting, but since...
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haruspex replied to the thread Magnitude of buoyant force in fluids of different densities.I have always assumed that Archimedes figured this out by imagining replacing the submerged portion with an equal volume of water...