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feixiaolin

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6Â¥2014-10-26 09:07:37
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hank612

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let dx/dt =p as a new variable, then
This gives

Then remaining task is an integral problem, although I cannot see the solution.
We_must_know. We_will_know.
2Â¥2014-10-23 13:26:51
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hank612

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ÒýÓûØÌû:
2Â¥: Originally posted by hank612 at 2014-10-23 13:26:51
let dx/dt =p as a new variable, then \frac{d^2x}{dt^2}=p\cdot \frac{dp}{dx}
This gives  v^2=-2\frac{g}{l}(\frac{x^2}{2}-\frac{x^4}{24})+C_1

Then remaining task is an integral problem, although  ...

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3Â¥2014-10-24 04:50:55
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suckseed18

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