# What is the Law of Conservation of Momentum Definition

## Law of Conservation of Momentum

In any collision or interaction between two or more objects in an isolated system, the total momentum before collision is equal to the total momentum after collision.

Example:

Consider two bodies A and B of mass m1 and m2 moving in the same direction with velocity U1 and U2 respectively such that U1 is greater than U2. Suppose the ball acquire velocity V1 and V2 respectively after collision.

Momentum of the system before collision = m1U1 + m2U2

Momentum of the system after collision = m1V1 + m2V2

According to the law of conservation of momentum:

Total momentum of the system before collision = Total momentum of the system after collision

m1U1 + m2U2 = m1V1 + m2V2

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