The law of conservation of momentum is stated for closed and isolated system. What are the two conditions for a system to be closed and isolated?
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No external force acts on the system and there is no change in mass of the system.
- No external force acts on the system and there is a gain in mass.
- No external force acts on the system and there is a loss in mass.
- An external force acts on the system and there is no change in mass.
The correct answer is: A
Explanation
For the law of conservation of momentum to hold, the system must be closed (no mass enters or leaves) and isolated (no external forces acting on it).