# What is the force, in terms of Coulomb's constant, between two electrical charges of 1 C and -15 C that are 9 m  apart?

Aug 6, 2016

I found: $0.2 k$

#### Explanation:

We have that the force between the two charges will be:
$F = k | {q}_{1} {q}_{2} \frac{|}{r} ^ 2$
where $k$ is our Coulomb Constant.

So we can write:

$F = k \frac{15}{9} ^ 2 = 0.18 k \approx 0.2 k$