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## Homework Statement

Find the Electrostatic potential energy of a cubical configuration of point charges as shown in the figure. Each of the charges is 5.00

*e*and the edge of the cube is 2 cm. (The image is simply a cube with one of the points labeled q)

## Homework Equations

U=kQq/r

## The Attempt at a Solution

I tried to do this problem by finding the PE at 3 different distances, being the closest 3 points, which are 2 cm away, 2nd closest 3 points which are sqrt(8) cm away and the farthest point which is sqrt(12) cm away. Then I used the formula to find the PE from each charge and added them all up. I keep getting the answer 1.65E-24 J, yet it's not right. Any help would be much appreciated.