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- Thread starter chocofingers
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- #1

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- #2

Doc Al

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Show how you would derive the first equation. You'd use similar thinking for all three.

- #3

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I don't know how to derive the first equation... If you could help me though for all the three... :)

- #4

Doc Al

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- #5

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so K1 e1 = K2 e2

Next what to do ?

- #6

Doc Al

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Good! Now realize that e1 = x1 and e2 = x2 - x1.I know the formulas ... tension(F) = k x e(extension) ...

so K1 e1 = K2 e2

- #7

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what is x1 and x2 ? is x1 the extension of spring e1 ? then what is x2?

- #8

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sorry i mean x2?

- #9

Doc Al

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I'd say (just from looking at the equation) that x1 is the displacement of the end of spring one from its unstretched position and x2 is the displacement of the right side of spring two from its unstretched position. Since the left side of spring one is fixed, x1 happens to equal the amount of stretch of spring one.what is x1 and x2 ? is x1 the extension of spring e1 ? then what is x2?

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