If every action has an equal and opposite reaction, then I
think the pull of gravity can be reversed somehow. anyone agree?
Sorry, I do not agree. However, forces always come in pairs. When gravity
pulls you and the earth together there are two forces. The earth pulls on you
and you pull on the earth. However, because you have so much less mass, you
move lots. The earth being so massive moves very little. Are you familiar
with F=ma? Or, more useful here a = F/m.
The F (force) is the same on both you and the earth, but you are dividing by
very different m's... so you get very different a's.
Hope that helps.
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Update: June 2012