Question

the gravitational force between 2 object is 2N.what will be the gravitational force between these object if the distance between them becomEs double

Answer 1

F1/D2=(r2)2/(r1)2=1/2
That is new force is one fourth of initial force

Answer 2

Gravitational force ∝ 1 / (Distance)²

So, if Distance is doubled gravitational force will be 1/4th

So,
Final Gravitational Force = 1/4 × Initial Gravitational Force
= 1/4 × 2 N
= 0.5 N