The Newton Trio is a term used to refer to the three laws of motion formulated by Isaac Newton. These laws are the law of inertia, the law of acceleration, and the law of action-reaction. The first law states that an object at rest will remain at rest, and an object in motion will remain in motion unless acted upon by an external force. The second law states that the rate of change of momentum of an object is proportional to the applied force. The third law states that for every action, there is an equal and opposite reaction. The acronym for these three laws is LAWS.