Question

how law of conservation of linear momentum is independent of frame of reference?​

Answer 1

Answer:

Momentum depends on the frame of reference, but in any inertial frame it is a conserved quantity, meaning that if a closed system is not affected by external forces, its total linear momentum does not change.

Answer 2

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According to the law of conservation of mass, the momentum is conserved in any collision. That means that the momentum before the collision must be same as the momentum after it. Momentum=Mass*Velocity. Mass is independent of the frame of reference(not considering relativity and high velocity situations)