The Law of Conservation of Momentum

Momentum is inertia in motion. The Law of Conservation of Momentum is momentum cannot be neither created nor destroyed. This means that the momentum put into something is equal to the momentum that will come out of it. By the two being equal to each other, it means that momentum is always conserved. Even when other external forces act upon an object, there is always an opposite force that makes the momentum of the object equal. Both force and momentum are vector quantities and that the momentum conservation principles apply separately to each coordinate direction. Impulse is the change in momentum.