I did all I can, and I'm stressed out over this. Thus, here I am. :( Here's the question (I substitute the numbers with alphabet letters): >Two point charges of magnitude of A nC and -B nC are separated by D m distance. >The acceleration of gravity is 9.8 m/s^2. The Coulomb constant, k, is 9x10^9 N*m^2/C^2. >What is the potential energy of the PAIR of charges? Answer in units of J. So, what I did was find the potential difference, V, between the 2 charges, q1 and q2, at their respective points which has the distance of D using the equation: V1 = (k*q1)/D V2 = (k*q2)/D Then find the electric potential energy(EPE) for each charge with the equation: EPE1 = V1 * q2 EPE2 = V2 * q1 *(EPE1 and EPE2 are basically the same number) And the total potential energy of the 2 charges is: EPE(net) = EPE1 + EPE2 Answer is negative because q2 is -B which has negative value x 10^-9 If anyone spot any error or have any idea of what I did wrong, please do tell. Perhaps, I missed a step of taking acceleration of gravity into account somewhere? Thanks.