>>11692291I was reading about this the other day.
Theories say that negative mass would flip the grav force with a normal mass to positive/repulsive force, but because f=ma and the m is negated, the acceleration would be negated and still be towards the normal matter. Weird. Like, if you blew a neg mass ping-pong ball it would come back TOWARD you.
Then there's speculation that pos and neg masses might annihilate each other, but with total mass of zero no energy would be released.
It got me wondering about charge antimatter annihilation - why would/do a positron and electron annihilate, but an electron isn't annihilated by contact with a proton?