Question

what happens to the fores beteween two objects if the mass of one object is doubled, the distance beteween objects is doubled

Answer 1

If the mass of both of the objects is doubled, then the force of gravity betweenthem is quadrupled; and so on. Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces.