F = k {( |q1|*|q2| ) / R^{2} }

Where **F** is the electrostatic force of attraction or repulsion between two charged particles (point charges).

**q1** and **q2** represent the point charges, which may be negative or positive.

**R** is the separation between the two points.

**k** is a constant, where
**k = 8.99x10**^{9} (N*m^{2})/C^{2} (Newtons)(meters squared) over (Coulombs squared)

Note the

similarities Coulomb's Law and

Newton's Law of Gravitation