By definition, the law of conservation of momentum states that the total momentum of interacting objects does not CHANGE. This means the total momentum BEFORE a collision or explosion is equal to the total momentum AFTER a collision or explosion.
First, momentum is defined as the product of the body's mass and its velocity at a given instant.
Momentum obeys a conservation law, which means that the total momentum of any closed system (that is, one that is not affected by external forces, and whose internal forces are nondissipative) cannot be changed and remains constant in time.
That is, the momentum of a particle remains constant when the resultant of the forces acting on it is zero during a time interval.
In summary, the law of conservation of momentum or principle of conservation of momentum states that the momentum of an isolated system is a constant. The vector sum of the moments (the moment is equal to the mass of an object multiplied by its velocity) of all the objects in a system cannot be changed by the interactions within the system.
The law of conservation of momentum states that the total momentum of interacting objects does not CHANGE. This means the total momentum BEFORE a collision or explosion is equal to the total momentum AFTER a collision or explosion.
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