Question

What is the force, in terms of Coulomb's constant, between two electrical charges of `1 C` and `-2 C` that are `4 m` apart?

Answer 1

I get `-0.125k \ "N"`.

Explanation:

We use Coulomb's Law, which states that,

`F=(kq_1q_2)/r^2`

So, we plug in the values, we get

`F=(k*1C*-2C)/(16 \ "m"^2)`

`=(-2kC^2)/(16 \ "m"^2)`

`=-0.125k \ "N"`