What is the force, in terms of Coulomb's constant, between two electrical charges of 2 C and 39 C that are 12 m  apart?

Mar 1, 2016

I found: $0.5 k$ ${C}^{2} / {m}^{2}$

Explanation:

We can write the force as:
${F}_{1 , 2} = k \frac{| {q}_{1} \cdot {q}_{2} |}{r} ^ 2$
where:
$k$ is the Coulomb's Constant
$r$ is the separation.
with our data:
${F}_{1 , 2} = k \frac{2 \cdot 39}{12} ^ 2 = 0.5 k$${C}^{2} / {m}^{2}$