Question

What is the force, in terms of Coulomb's constant, between two electrical charges of `-5 C` and `-2 C` that are `3 m` apart?

Answer 1

The force is `=(10/9k)N`

Explanation:

The force between two charges is

`F=k(Q_1Q_2)/r_1^2`

Where `r` is the distance between the charges

Here, the distance is `r=3m`

The Coulomb Constant is `k=9*10^9Nm^2/C^2`

The charge `Q_1=-5C`

The charge `Q_2=-2C`

The force is

`F=k((-5)xx(-2))/(3)^2=+(10/9k) N`

The force is repulsive