If gravitational force acts between all objects, why don’t they move towards each other?
Answers
It’s important to recognize that the gravitational force exerted by any of the various bodies around you (your computer monitor, cell phone, best friend, football, house, toilet, etc) is incredibly small in magnitude compared to that of the Earth. Secondly, the reason you aren’t accelerating towards your computer monitor in front of you is because if you account for all the objects around you and their respective gravitational pull, it all cancels out and you are in static equilibrium. Even if it doesn’t cancel perfectly, the force will be so small that friction will inhibit any noticeable movement. If you go on a journey around the Solar System, then you need to account for the gravitational pull of the various planets and the Sun because the magnitudes are no longer negligible and do not necessarily cancel out.