**1-3)The law of motion of negative mass and negative mass**
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- m1 ------ - m2

fig03. Ngative mass - m1 and negative mass - m2 (initial velocity =0, m1>0, m2> 0)

In this case, momentum conservation is valid.

, because, let's view to the acceleration term.

,

is opposite direction(spherical coordinate +r direction). So, velocity direction is opposite direction.

In the spherical coordinate

In the rectangular coordinate

Negative mass and negative mass: Both two objects are accelerated in the direction of + r which extends distance r, so as time passes, the distance between them is greater than initially given condition, and

** **__the force between them is attraction, but the effect is repulsive.__
**The force is attraction(-Gm1m2/r^2), thus the potential energy between them has negative value.**
If negative mass and positive mass were born together at the beginning of universe,

**positive mass has attractive effect each other, so it forms star and galaxy structure now,** __but negative mass has repulsive effect each other, so they cannot make massive mass structure like star or galaxy.__
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Hypothesis of Dark Matter and Dark Energy with Negative Mass :

http://vixra.org/abs/0907.0015