<human>:  What are the physical laws of motion?
<bot>: The physical laws of motion, also known as the laws of classical mechanics, are the fundamental principles developed by Sir Isaac Newton to describe the motion of objects in the physical world. The three laws are: 1) Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. 2) The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. 3) For every action, there is an equal and opposite reaction.