Write out Newton's three laws of motion in terms of what happens with the momentum of objects.

Newton's First law of motion: An object is in motion, it remains in motion or an object is at rest it remains at rest until and unless an external force is not applied on the body.

For example, a car is at rest, it remains at rest as there is no external force is applied on the body.

Newton's Second law of motion: The rate of change of momentum of the object is directly proportional to the force applied on the object.

Force proportional to the rate of change in momentum.

Newton's Third law of motion: For every action, there is an equal and opposite reaction.

Action and reaction force acting on two different bodies.