The electric potential energy of given configuration of chargesis defined as the work which must be done against the Coulomb forceto rearrange charges from infinite separation to this configuration(or the work done by the Coulomb force separating the charges fromthis configuration to infinity). For two point-like charges Q1 andQ2 at a distance r this work, and hence electric potential energyis equal to:E_mathrm{p,e} = frac{1}{{4piepsilon_0}}{{Q_1Q_2}over{r}}============================================Yes, yes, undoubtedly correct. But what is an electrostaticforce ?Atraction between two opposite forces