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Conservation of momentum in a collision ...

Conservation of momentum in a collision between particles can be understood from

A

Conservation of energy

B

Newton’s first law only

C

Newton’s second law only

D

Both Newton’s second and third law

Text Solution

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The correct Answer is:
D
We know that for system
`F_("ext") = (dp)/(dt) ` (from Newton.s second law)
If `F_("ext") = 0, dp = 0 rArr p ` = constant
Hence , momentum of a system will remain conserve if external force on the system is zero.
In case of collision between particles equal and opposite forces will act on individual particle by Newton.s third law,
Hence total force on the system will be zero.
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