Both the electrical force and the gravitational force between two objects share which relationship?
they are directly proportional to mass.
they are inversely proportional to the square of the distance.
they are inversely proportional to charge.
they are directly proportional to the square of the distance.

They are inversely proportional to the square of the distance.

Explanation:

The magnitude of the gravitational force between two objects is given by

where G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between the two objects.

The magnitude of the electrical force between two objects is given by

where k is the Coulomb's constant, q1 and q2 are the charges of the two objects, and r is the distance between the two objects.

In both cases, we see that the magnitude of the force is iinversely proportional to the square of the distance, , so the correct option is

They are inversely proportional to the square of the distance.