First of all, hey everyone.(adsbygoogle = window.adsbygoogle || []).push({});

I was wondering if any of you could help me solve this. I've tried but i keep getting insane equations so I might be doing something wrong.

Two equal spheres with a mass of m have equal charges q. They're suspended by two ropes with length L in points distanced d apart. Calculate the distance between the (centers) of the two spheres when this setup is in balance.

Picture: https://dl.dropbox.com/u/29642931/phys.png [Broken]

What I've tried so far is:

The forces acting on the ball are the electric forces from the charges, the gravity and the tension frmo the rope. I figured the sum of these forces should be 0 for this setup to be balanced, which led me to: F_{g}+ F_{el}+F_{rope}with |F_{rope}| = |F_{g}|/cos(θ) + |F_{el}|/sin(θ), but this is insanely hard to solve..

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# Homework Help: Electric force question

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