Sir Isaac Newton (1642-1727) was the greatest scientist of his time. This English physicist and mathematician established the modern study of optics. He was the first to articulate a concept of the force of gravity. In his “Philosophiae Naturalis Principia Mathematica” (“Mathematical Principles of Natural Philosophy”), published in 1687, Newton demonstrated the way in which the universal force of gravity – also referred to as weight – applied to all objects in the universe.

Newton is perhaps best known for his work with the three basic laws that are the basis of the science of Newtonian physics. These laws are known as:

- Newton’s First Law – The law of inertia
- Newton’s Second Law – The law of acceleration
- Newton’s Third Law – The law of equal and opposite forces

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