(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the potential energy of this system without gravity. And after that i have to find the point of equilibrium.

http://img534.imageshack.us/img534/2667/img0121km.jpg [Broken]

2. Relevant equations

[tex] V=\frac{1}{2} K d^2 [/tex]

3. The attempt at a solution

[tex] V=\frac{1}{2} K d^2 = \frac{1}{2} K \left( l^2 +4l^2 - 4l^2 \cos{ (\phi - \theta)} +4l^2 \sin^2{\theta} \right) [/tex]

is it correct ? i think it isn't becouse i find strange result in the next step.

Thanks

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# Homework Help: Potential energy of a spring

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