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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

Verified by Experts

The correct Answer is:
D
We know for a system `" " F_("ext") = (dp)/(dt) " " ` (from Newton's second law)
If `F_("ext") = 0 `, dp = 0 `implies` 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 individuel particles by Newton's third law .
Hence total force on the system will be zero.
Note We should not confuse with system and individual particles . As total force on the system of both particles is zero but force acts on individual particles.
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