Gravitational force f exists between oint objects a and b seperated by distance r. if the mass of a is doubled and the distance r is tripled, what is the new gravitational force between a and b?

- - Doubling one mass doubles the product of the masses, and

doubles the strength of the gravitational forces between them.

- - Tripling the distance between them changes the strength of the

gravitational forces between them by the factor of

1 / 3² = 1 / 9.

- - The new gravitational force between the objects is

(2 / 9) = 22.2%

of the strength of the original gravitational force.