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Introductory Physics Homework Help
Finding x for a spring using energy equations
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[QUOTE="cbasst, post: 4370766, member: 445361"] [h2]Homework Statement [/h2] This isn't a homework question, just something I've been thinking about. If given a situation in which mass m is hung on a spring with constant k, I know you can set the spring force equal to the weight of the mass to find how far it stretches. Is there a way to find how far it stretches using energy equations? It seems like it should be doable, but I can't figure out how. [h2]Homework Equations[/h2] w = mg F = -kx ΔU[SUB]g[/SUB] = mgh U[SUB]s[/SUB] = kx[SUP]2[/SUP]/2 [h2]The Attempt at a Solution[/h2] As I said, setting mg = kx can solve for x. How do I do it with energy though? U[SUB]g[/SUB] = U[SUB]s[/SUB] mgx = kx[SUP]2[/SUP]/2 But now I get a different answer for x. What did I do wrong with the energy equations? [/QUOTE]
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Introductory Physics Homework Help
Finding x for a spring using energy equations
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