Question

if the distance between two masses is increased 3 times, the force of attraction of gravitation will decrease by _________ times.

Answer 1

F proportional to 1/r²
F(initial)=gmm/r²
F(final)=gmm/(3r)²
F-F/9=8F/9
8/9 times decrease

Answer 2

It 8/9 times decrease of the attraction of gravitational force