The famous scientist associated with the laws of motion is Sir Isaac Newton. In the 17th century, he formulated three fundamental laws that describe the relationship between the motion of an object and the forces acting upon it. His First Law, the principle of inertia, states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by an external force. The Second Law, F=ma (force equals mass times acceleration), establishes the quantitative relationship between force, mass, and acceleration. The Third Law states that for every action, there is an equal and opposite reaction. Newton's contributions laid the groundwork for classical mechanics and revolutionized the understanding of physical laws.