« on: 26/06/2014 18:25:13 »
Momentum doesn't need to "begin" because it is a conserved vector, so the net momentum inside a closed system is zero. You push the car, you feel it resisting as it accelerates, and the earth moves ever so slightly backwards.
What is a conserved vector if you don't mind me asking ?
I did a search for the terms online and could not find a clear definition:
No paradox. If you push something, you can feel it pushing back at you for as long as it is accelerating.
Even in space ?