06.III.1430
Recently i wondered about a type of charge that would see one body attracted to another , while the other is repelled by it. It turns out that hypothetical negatively massive particles present such a situation.
Someone , misunderstanding the question, suggested it is the electric charge. But like electric charges repel one another, while two opposite attract one another. What I was asking for was different.
A particle attracted to another, while the other is simultaneously repelled by it.
It turns out such a situation is possible, but only hypothetically, with particles having negative mass.
As per the people's (for now) encyclopedia -
"Assuming that all three concepts of mass [inertial mass, grav potential mass and active mass (force in response to gravity)] are equivalent it would produce a system where negative masses are attracted to positive masses, yet positive masses are repelled away from negative masses."
- "Exotic matter." Wikipedia, The Free Encyclopedia. 12 Feb 2009, 18:28 UTC. http://en.wikipedia.org/w/index.php?title=Exotic_matter&oldid=270267597. Accessed 03 March 2009.
Objects with negative mass would enable us to have things levitate and would provide cheap clean transportation.
But where is it?
The law of nature requires that energy be only positive-valued or zero. it is called positive semidefiniteness. There are also limits on mass to length ratio.
In other words , "there is no antigravity."
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