Question

what will be the gravitational force between two object if-
1. The mass of an object is doubled.
2. The distance between the object is tripled.
3. Mass of both the object is doubled

Answer 1

1. F1 = Gm1m2/d^2

m1 =2m1

F2 = G (2m1)m2 / d^2

F2 = 2Gm1m2 / d^2

F2 = 2F1

2. F1 = Gm1m2 /d^2

d^2 = 3d^2

F2 = Gm1m2 / (3d) ^2
F2 = Gm1m2 / 9d^2
F2 = 1/9d^2Gm1m2
F2 =1/9F1

3.F1= Gm1m2 /d^2

m1 = 2m1
m2=2m2

F2 =G(2m1 )(2m2) /d^2

F2 = 4 Gm1m2 / d^2

F1=4F1

hope it helps.... by the way even I'm from 9th