Question

Show the equation of total momentum before and after collision are equal.

Answer 1

Momentum is the product of mass and velocity.

P=mv

So the total momentum in a system before a collision, and after of anytime since it is conserved, would be the sum of all the individual momentum.

P(total)=m1v1+m2v2+....

Now if these things are all moving at different directions, then vector angles and sign changes get involved, but all the momentum is still there.

Answer 2

The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.