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General => General Discussion => Topic started by: rumborak on January 03, 2013, 02:54:52 AM
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I am trying to remember a certain technique in physics, but just can't think of the name. It's used when calculating forces etc in an equilibrium. What you do is to add an infinitesimal displacement to a border and see what the new energy distribution is. The difference in the energy from the equilibrium energy gives you the force acting on that border.
There is a term for that computational tool, but what is it?
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Perturbation Theory? Hamilton's Integral Principle?
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Aaah, found it finally. It's called "Virtual work" and works with the calculus of variations..
This thread can now be about bunnies in a basket.
EDIT: Ooh, pertubation theory is cool too. Thanks!
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Aaah, found it finally. It's called "Virtual work" and works with the calculus of variations..
This thread can now be about bunnies in a basket.
Hamilton's Principle, then. What's that you have to calculate, for curioisty? :)
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Interestingly, this has nothing to do with physics at all. I'm writing a paper where I'm optimizing a computational cloud in its configuration, and the method I use is very similar to Hamilton's Principle. Given that I'm already making heavy physical analogies in the paper, I figured I'd mention this too.
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Interestingly, this has nothing to do with physics at all. I'm writing a paper where I'm optimizing a computational cloud in its configuration, and the method I use is very similar to Hamilton's Principle. Given that I'm already making heavy physical analogies in the paper, I figured I'd mention this too.
It's very interesting. I would probably enjoy the read. Now onto my paper on amplifiers, again... :-\
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Sounds pretty wizard, I must say.
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(necro because it's better than making a new thread)
So does anyone know if there's a formula I can use to determine an initial velocity from an initial force & mass? Like, if you wanted to use the displacement formula: s = ut + at^2/2, would there be a way to get u if all you had was the force you placed on the object & the object's mass? I've looked through my notes & I can't seem to find if there's a formula that relates the three variables directly. I know there's F = ma, but is there a variation on that where you have velocity instead of acceleration? This isn't anything urgent, but I'm working on a simulation & I'm wondering if that formula existed. Thanks in advance.
Edit: Nevermind, I figured it out
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nerds
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(https://media.giphy.com/media/A9KfKenpqNDfa/giphy.gif)
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Hey, I actually knew the answer to this one. I learned it in a strength of materials class, but haven't used it since.