2. Momentum of a system is conserved if
(a) external force acts on it
(b) no external force acts on it
(c) it is accelerated
(d) small external force acts on it
Answers
Answered by
1
Answer:
(a) external force acts on it.
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Answered by
0
Answer:
b. no external force acts on it
Explanation:
A closed (or isolated) system is defined to be one for which the mass remains constant, and the net external force is zero.
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