How would you do Negative or Imaginary mass?

Questions
1

I wanted to test some game ideas using negative mass, and imaginary mass. But my knowledge of this is poor, and i was wondering if anyone has any ideas.

I don’t know how to read the equations for this :neutral:

2

@xThomas You don’t say how you’re using mass. If you use the Codea Physics engine, the reference says you can’t set mass as negative. If you’re using mass in one of your own equations, then just make it negative. Whether that will work depends on your equations.