Coulomb’s law describes force between charged particles (charged small bodies).
$$\vec F_2 = \frac{1}{4 \pi \varepsilon_0 \varepsilon} \frac{q_1 q_2}{r_{12}^3}\vec r_{12}$$
Here $\varepsilon_0 = 8.85 \cdot 10^{-12}F/m$. All other variables in formula shown below pictures.
