If the distance between massive objects doubles, what happens to the force between them?
We are presumably talking about gravity
F = G M1*M2 / d^2
F' = G M1*M2/(2d)^2 = G M1*M2/4 d^2 =(1/4) F
F = G M1*M2 / d^2
F' = G M1*M2/(2d)^2 = G M1*M2/4 d^2 =(1/4) F