Question

Why two stones do not come closer, even if there is gravitational force of attraction between them ?

Answer 1

If we calculate the acceleration because of the force of gravitation between two stones, we see that it is of the order of ${10}^{-12}$$\frac{m}{{sec}^2}$. And also, other forces like force of friction are much higher than the force of gravitation between them. Therefore, they do not come closer.