Sir Isaac Newton (1643­1727) was an English mathematician and 
physicist. He invented calculus and discovered several laws of physics. 
His three laws of motion became the foundation of modern dynamics. 
From them he derived the law of universal gravitation. His theories 
established a system of natural science that has since dominated 
Western thought.

Newtonian (or classical) physics is concerned with objects that are 
large in comparison to an atom and which move slower than the speed 
of light. It is based on Isaac Newton’s three laws of motion which set 
out a framework for studying the motion of objects and the forces 
which act upon them.