Can we convert mass of a thing to its negative form (anti-gravity condition)?

Question

Like a rock ,if we can convert it into its negative ,that rock have no weight and doesn't "fall into the ground again" (flying).

Answer 1

According to Einstein, gravity isn't a force, its the consequence of bent space created by the presence of matter. This is why light bends around a star even when it doesn't have mass - its really just taking the path of least resistance.

That said, anti gravity, at least according to Einstein isn't going to happen.

Answer 2

As above, gravity is currently believed to be bent space. All objects lies on a piece of soft fabric, the heavier an object is, the deeper it sinks, and the higher the gravity.
So based on this theory... if you want anti-gravity, you might jump to the other side of the fabric (don't ask me how) to experience anti-gravity :)

By the way, if anything, anti-gravity shouldn't allow things to fly up stationary. It should rather repel you away from earth. So basically you'll be falling up to the sky, endlessly.

Answer 3

I did make an anti gravity machine once but I put it down to bite my sandwich and I never saw it again.

But seriously, even anti-matter has the same type of gravity that we do. It would fall down. There is no such thing as negative mass or anti-gravity that we know of.

Answer 4

our current understanding of gravity, according to the latest theories of modern physics, is not good enough to be sure if "anti-gravity" can exist.

the only thing that we know of that might be called a "negative" form of matter is anti-matter. the difference between matter and anti-matter is electronic charge. in matter, electrons have a negative charge and protons have a positive charge. in anti-matter, these charges are reversed. the gravitational characteristics of matter and anti-matter, however, are the same.

Answer 5

Gravity is a manifestation of matter so it would act the same way with anything.