where Fa is fictitious force. Direction of fictitious force is opposite to the accelerated motion of S' frame of refrance.
Law of conservation of momentum is one of the basic laws and is derived from Newton’s Laws of motion. This law always holds true even in the situations where Newton’s laws of motion fails to hold. This law states that in the absence of resultant external force acting on the system , the total linear momentum of the system always remains constant i.e.,
This is law of conservation of linear momentum for system of particles. For individual particles momentum may change but their total momentum remain unaltered in absence of external forces.
Now the law of momentum is fundamental and exact law of nature. No violation to it has ever been encountered.
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