What if gravity was not downwards but upwards?

Question

imagine a world (or imagine our world) with gravity acting upwards not downwards ....................then a ball that will go up will never come down ..........!!!!!!

Answer 1

then we won't need rockets and aeroplanes any more.

Answer 2

That implies matter repels other matter meaning that the planet would never have accreted in the first place and the universe would be a uniform and boring place full of dust.

Answer 3

Yeah we would all die because we would float up and burn in the atmosphere and life would cease to exist.

Answer 4

Well, think of it this way. When you jump from the ground you have a hard time getting in the air. Think of the oppisite of that which is if you're in the air you have a hard time getting down. So, if you threw a ball you wouldn't be able to get it because it wouldn't come down and it would instead be going in the air.

Answer 5

then the earth would have never existed in the first place because the debris that made the earth would have repelled each other.

Answer 6

If the world were that way, then gravity itself would be odd.

Answer 7

We would be walking on air!!!!

Answer 8

all we need to do is switch the definition of up and down.