Question

The electrical force between two objects 36N. If the distance between the two objects is doubled the force between them will be

Answer 1

Answer:

The electrical force is 9N

Explanation:

For point loads,  charged bodies very small compared to the distance r that separates them,  Coulomb discovered that the electric force is proportional to $\frac{1}{r^{2}}$. So, if the distance is doubled, the force will decrease a $\frac{1}{4}$ of its initial value.

$F=\frac{36N}{4}=9N$