Conservation of momentum explains why a gun or cannon recoils backwards when it is fired. When a cannon is fired, the cannon ball gains forward momentum and the cannon gains backward momentum.

When two objects collide the total momentum before the collision is equal to the total momentum after the collision (in the absence of external forces). This is the law of conservation of momentum.

Unlimited expansion thus seems also to be the preferred strategy of system builders. Large scale technological systems acquire momentum as they grow. By this is meant that once the basic decisions ...

In this educational film, scientist pilot Owen Garot discusses the principles of conservation laws demonstrated during the ...