text: what is the opposite of gravitational force?   there isn't really an opposite to gravitational force.. however there are things to counter-act it.  gravitational force is considered a supernatural force.. so the only thing that would be opposite would be a different supernatural force..   things that would kind of oppose it would be g-forces, magnets, and stuff like that.. as far as i know the only thing that would be a complete opposite of gravitational force would be gravitational force.. for instance, if you had two planets that are totally equivilent, then one gravitational force wouldn't be any stronger than the other. if you stuck something in between the planets, it would just stay there if it had no movement to begin with, but according to newton's second law, if something is moving, even slightly, then it will continue moving until a supernatural force stops or changes it, ie: gravity.  bouyancy wouldn't be an opposite because whatever is on the water surface is still being held down to the water by gravitational force.