Always considered antimater as negative mass so: $$m1=10kg(matter)$$ $$m2=-10kg(antimater)$$ $$displacement=r=10m$$ $$gravity =\frac{Gm1m2}{r^2}=-1N<0!HOW?$$
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That is not 0zero factorial. – protectgoodlivingbeingask Nov 25 '20 at 06:42
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1What happened to the value of $G$? – G. Smith Nov 25 '20 at 06:50
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2Antimatter doe not have a negative mass. It has the opposite charge. – John Alexiou Nov 25 '20 at 07:05
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Here's a recent question on this topic. Although it's closed, it has good info & links. https://physics.stackexchange.com/q/589812/123208 – PM 2Ring Nov 25 '20 at 08:15
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Also note that when antimatter annihilates with regular matter it releases positive energy. That's been measured innumerable times. – PM 2Ring Nov 25 '20 at 08:19
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1Related:https://physics.stackexchange.com/questions/230786/what-effects-would-a-finding-of-gravitational-repulsion-between-matter-and-anti – Lewis Miller Nov 25 '20 at 15:38
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- Physicists mostly expect antimatter to have positive gravitational mass because it has positive inertial mass, but until that's empirically verified it's the subject of a small controversy.
- The sign of a force indicates whether it attracts or repels. (If any inertial mass were negative, you'd have to take that into account as well.
- In fact, Newton's formula for the gravity between two positive gravitational masses reflects its being attractive by having a minus sign you didn't know about, in $-Gm_1m_2\vec{r}/r^2=-Gm_1m_2\hat{r}/r^3$.
J.G.
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By assuming antimater mass <0 I felt it would repel mater. – protectgoodlivingbeingask Nov 25 '20 at 06:50
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@ask Well, now I've explained how signs work, you needn't ever get confused when doing these calculations. – J.G. Nov 25 '20 at 07:14