# Write the law of conservation of momentum & write it's mathematical expression .

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Law of conservation of mass states that the momentum of the system remains constant if no external force is acting on it

mathematically

m1u1+m2u2=m1v1+m2v2

mathematically

m1u1+m2u2=m1v1+m2v2

The Brainliest Answer!

the total momentum of a closed system does not change.

This means that when two objects collide

the total momentum of the objects before the collision

is the same as

the total momentum of the objects after the collision.

Total momentum means

the momentum of object 1 plus the momentum of object 2.

Object 1 might not have the same momentum before and after

the collision

but the amount of momentum object 1 gains from the collision

is the same as the amount of momentum object 2 loses

so the total momentum

remains the same whether the collision is elastic or inelastic.

The total momentum is also the same before and after an explosion.

Mathematically; m1u1+m2u2=m1v1+m2v2