2 ms·
Huh? If you have a system with nonzero momentum, it can't later have zero momentum. The "prescribed velocity" can't be lost, it must be conserved.
by millstone 9y ago
Huh? If you have a system with nonzero momentum, it can't later have zero momentum. The "prescribed velocity" can't be lost, it must be conserved.
- goldenkey 9y agoWe are talking about a net momentum of zero. It can be in all kinds of different forms without violating conservation. Exchanging a left and right moving particle for up and down ones, changes the system but retains global conservation