Question

what happens to the force between two objects, if. (i) the mass of one object is doubled? (ii) the distance between objects is doubled and tripled ? (iii) the masses of both objects are doubled?

Answer 1

F=Gm1m2/r2(gravitational force)-----------(1)
case 1) F is directly proportional to masses so, force will be double.
case 2) F is inversely proportional to distance so, forces become 1/4&1/9 respectively of the original force.
case 3)
following (case 1) the force b/w two bodies will become four times the original force.
Here original force is equation (1)

Answer 2

HEY mate here is your answer....

í)if the mass of the one object is doubled then the gravitational forces get doubled.
ii)if the distance is doubled then the force is reduced by 1-4th
if tripled it is reduced by 1-9th.
iii)if the masses of both the objects are doubled then the force increases by 4 times.

hope it helps you...