He is credited with developing the three laws of motion, which are fundamental to classical mechanics:
1. First Law of Motion (Law of Inertia): An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
2. Second Law of Motion: The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This is often represented by the equation F = ma (Force equals mass times acceleration).
3. Third Law of Motion: For every action, there is an equal and opposite reaction.
Newton's work revolutionized our understanding of how things move and laid the foundation for modern physics.