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

http://s62.photobucket.com/albums/h116/pepsi_in_a_can/?action=view¤t=diagram.jpg

Each side of the triangle has a given length "d." Calculate the electric potential at point P.

2. Relevant equations

[tex] V(\vec{r}) = \frac{kq}{r} [/tex]

I believe this is for the elec. potential at some distance r for a point charge q, but I'm not completely sure.

3. The attempt at a solution

My main problem is whether or not to take the sign of each charge into account when I'm summing the voltage. For instance, when considering the charges horizontal to the point P, +3q and - 3q, if I take the signs into account, I end up with zero voltage. I've read that the idea of superposition applies, but the voltage is a scalar, and needs to be handled differently.

A push in the right direction would be much appreciated.

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# Homework Help: Calculating electric potential

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