Question

What is the force, in terms of Coulomb's constant, between two electrical charges of `-3 C` and `-4 C` that are `4 m` apart?

Answer 1

`F=3/4K`

Explanation:

Given the force for 2 bodies of set charge, in terms of Coulomb's constant is
`F=K(q_1q_2)/r^2`

Here, we'll take `q_1=-3C` and `q_2=-4C` and `r=4m` so that means `r^2=16m`

Substituting the values, we get `F=k(-3*-\cancel4^1)/cancel{16}^4`

Cancelling the negative terms, we see that the answer is what I have mentioned up there.