I suppose as a side note, a future space insustry would be fuel harvesting.
Another thought occurred to me. Can the sudden mass displacement be used as a directed motion. Eg: wheel with a central axis on a ramp. If you place mass at the center of the axis, the wheel will roll uniformly down...
Hello PF members,
I was wondering whether Newtons third law was exclusive to spacecraft thrust; space being empty and without enough particles for a force to push against. That in order to produce thrust in space, you would need to carry the fuel that you plan to eject with you...