# Homework Help: Calculating the electric potential at the midpoint

1. May 16, 2016

### rrosa522

1. The problem statement, all variables and given/known data
How do you calculate the electric potential at the midpoint between two point charges?
2. Relevant equations

3. The attempt at a solution
I was asked to find the electric potential at the midpoint of every side of an equilateral triangle. I have no clue how I could do this find the midpoint.

2. May 16, 2016

### Staff: Mentor

What equation is relevant for finding the electric potential at some distance from a point charge?

3. May 16, 2016

### rrosa522

V=keq/r

4. May 16, 2016

### Staff: Mentor

Okay, I presume you mean

$V = k\frac{q}{r}$ where k is Coulomb's constant.

So what are the distances to each charge from one of the midpoints of a side of the triangle? Make a diagram and use a bit of geometry.