So let's look at Coulomb's law for a second. Coulomb's law gives us the force felt by two charges some distance apart. What it states is the following. If we have two charges, q one and Q two, if we multiply them together and multiplied by the constant k and divided by the distance between their center of charges squared, we get the force that each charge feels due to the other charge. Remember, plus charges repel and plus and minus attract. So notice what we have here.