He formulated three laws of motion that are fundamental to classical mechanics:
1. Newton's 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. Newton's 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 can be expressed as the equation F = ma (Force = mass x acceleration).
3. Newton's Third Law of Motion: For every action, there is an equal and opposite reaction.
These laws explain how forces cause changes in motion, and they are essential for understanding the movement of everything from planets to everyday objects.
