How do you use Coulomb's law?

Mar 8, 2018

$| {F}_{{e}^{-}} | = \frac{K \cdot {q}_{1} \cdot {q}_{2}}{r} ^ 2$
$| {F}_{{e}^{-}} | = \frac{K \cdot {q}_{1} \cdot {q}_{2}}{r} ^ 2$
The two q's shown are charges both in the standard units coulombs. The r is the distance between the two charges in meters. The K is the electrical constant, $9 \cdot {10}^{9}$ similar to the gravitational constant in the ${F}_{g}$ formula ${F}_{g} = \frac{G \cdot {m}_{1} \cdot {m}_{2}}{r} ^ 2$. Coulomb's law however only provides the absolute value of the force to be felt due to the charges.