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#### Quintessential

##### New member

- Feb 3, 2014

- 7

And this is what I did.

Realizing the following:

**E**= -▽

**V**

I simply took the derivative in regards to the vertical component, in this case "a".

So:

-dV/da [the above formulae]

And I got the following:

Κλl/(a sqrt(l^2+a^2))

Does that seem about right?

**Sorry, I have no idea on how to operate the sexy mathjax characters.