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nirvana33 [79]
2 years ago
10

The momentum of a system is conserved:

Physics
2 answers:
malfutka [58]2 years ago
5 0
I think the answer is I.
Basile [38]2 years ago
4 0

Answer:

I. when no net external force act on the system

Explanation:

Suppose you are exerting an external force F on an object, it's velocity keeps increasing. Which means its momentum = velocity * mass is also increasing. In this case the initial momentum of that object is not preserved (but increased).

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