Conservation of momentum in a collision between particles can be understood from:
Text Solution
Verified by ExpertsThe correct answer is:
D
We know that for a system 
(from Newton's second law)
If 
constant
Hence, momentum of a system will remain conserved if external force on the system is zero.
In case of collision between particles equal and opposite forces will act on individual particles by Newton's third law.
Hence, total force on the system will be zero.
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