Newton’s First Law of Motion: Law of Inertia First published in Newton’s book Principia Mathematica Philosophiae Naturalis, these laws have shaped the foundation of the study of motion in physics, after Galileo Galilei’s findings.

These three laws determine the behaviour of objects when they are in motion, when they are still, or when some force is applied to them.

Newton’s Third Law of Motion: The Action-Reaction Law. Newton’s Second Law of Motion: Law of Momentum Newton, who lived from 1642 to 1727, formulated the three laws of motion in the year 1686. Isaac Newton is one of the most well-known names in physics, and the most significant one when studying ‘Motion’.