Thanks very much, that makes clear sense now that I think about it!
So does that mean that the small body in the problem technically carries no force until it receives an acceleration by colliding with another body or being affected by an external force? That's an unusual concept..
Hi all, here is a problem that has popped into my head every so often for the last year or so:
A small, low-mass body is moving at a constant velocity of 1000m/s through a vaccuum, so it has no acceleration or deceleration i.e. a=0. Now let's say you are an astronaut and you are floating...