Question

According to the Universal Law of Gravitation, if the separation between two planets is increased by a factor of 8, how many times weaker will their mutual pull of gravity be?

Answer 1

weakens by 64 times

Step-by-step explanation:

According to universal law of gravitation the force between two bodies is inversely proportional to square of their distance between them that F is inversely proportional to
`r^2`

So if we increase the the distance between two planets by 8 times then the the mutual attraction between will be decrease by
`8^2` times