Answer to Question #266397 in Physics for Kristine

Question

What is the distance between 3kg and 5kg mass particle if the gravitational force on 3kg due to 5kg particle is 5.12x10^-4 N?

Answer 1

The distance (obtained from the law of universal gravitation):

$$r=\sqrt\frac{Gm_1m_2}{F}=1.4·10^{-3}\text{ m}.$$