Question

As the distance between two objects increases the force of gravity between them is

Answer 1

The force of gravity is proportional to 1/r^2, where r is the radius (distance) between the objects.
So if the force was originally
`(1)/(r^2)`, doubling the distance between them would make the new force
`(1)/((2r)^2) = (1)/(4r^2) = ((1)/(4)) (1)/(r^2)`