if the EARTH HAS GRAVITY, A "N" & "S POLE, WHY CANT WE GREAT A METAL THAT WILL REACT AS A NEG F & CAUSE FLIGH

Answer 1

Because the metal will ALSO have a north and a south magnetic pole.

Do not confuse gravity, which does not have polarity, and magnetism which has. Magnetic monopole is still a theoretical particle the existence of which is not certain, far from it.

Answer 2

Gravity, to a practical extent, only acts in one direction.

Earth's magnetic field has two directions (poles), but this is a different type of field than a gravitational field.

If you are asking why we can't levitate by standing on the magnetic south pole and overturning a magnet against earth's field, it's because earth's field is too weak for this to be practical (the magnet couldn't lift its own weight). Also remember, the energy it would take to overturn the magnet is lower than the energy you could get out of the magnet as a result.

Answer 3

I'm confued as to what you are asking, is it, can we create a metal that is only a South Pole, and make it fly forever on Earth's North Pole(which is actually a magnetic South Pole)?

The answer is no, Magnetic Monopoles don't exist, we haven't been able to create one yet, and theory says we can't...

Answer 4

If you're asking why we can't create a magnet that will float on the Earth's magnetic field, the answer is that the Earth's magnetic field is pathetically weak. It can barely pull a magnetized needle around in a compass. Lifting objects is out of the question.

If you're asking why we can't create something that is repelled by gravity, the answer is that negative mass does not exist. Mass, like distance, can only ever be positive.