I'm not sure where to put this post, so I will put this post in this. Let's imagine for just a bit that anti-gravity was possible, and we built a machine do it. That is, the machine -somehow- made a piece of mass totally weighless, there is nothing teathering it to Earth. But, since it has a great bit of centrifical force, it should sling out of the Earth at an alarming rate. It's like the ball on the string, you swing the ball, then you cut the string, the ball flies off. So, how would someone who's wanting to make ant-gravity get passed this?