An object being fired from a cannon is also a collision where momentum must be conserved. As the momentum before the 'collision' is zero, the momentum after the collision is zero. In physics ...

Negative momentum is likely to direct your marriage on a collision course with divorce, while positive momentum will sustain a trajectory of comfort and contentment. If negative emotional momentum ...

Impulse-momentum can be used to calculate the average ... every action force has an equal and opposite reaction force. In collisions this means that the force of one object on the other is equal ...