37.5k views
4 votes
The momentum of a system is conserved:

I. when no net external force act on the system

II. when no internal forces act on the system

III. always

2 Answers

4 votes
I think the answer is I.
User Fabio Mora
by
7.6k points
3 votes

Answer:

I. when no net external force act on the system

Step-by-step 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).

User Giammin
by
8.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.