# Isac Newton

## Isac Newton

Born: December 25 1642 Woolsthorpe, Lincolnshire, England

Died: March 20 1727 in Kensington, England

## education

Isaac Newton arrived at Trinity College Cambridge in June, 1661. Although his mother was quite wealthy, Newton entered the college as a "sizar," or a student who received an allowance in exchange for acting as servant to other college students. Newton began by studying law. Teaching at Cambridge in Newton's time focused on studying Aristotle, but in his third year Newton developed an interest in Boyle's scientific writings on chemistry and mathematics. He also studied Galileo's mechanics of astronomy and Kepler's work on planetary laws, optics and geometry.

## contributions

Sir Isaac Newton had many contributions to physics. Laws of Motion were some of his main contributions. He discovered these laws in 1687.

## newtons laws

Newtons first law states that an object in motion will remain in motion unless acted upon by an unbalanced force. This force could be anything from friction to wind resistance. Without these unbalanced forces any object would remain at a constant velocity if a force was applied.

Isaac Newton’s second law of motion states that the greater the mass the greater amount of force needed to accelerate the object. Acceleration happens when a force is applied to an object. We use this law everyday without knowing it. For example if I push a ten pound medicine ball it requires a greater force than pushing a marble. The mathematic equation for this law is force equals mass times acceleration.

Newton’s third law of motion is for every action there is an equal and opposite reaction. This means when there is a force applied there is an opposing force equally as strong. So when you push any object that object pushes back. This is Newton’s third law of motion.

Newton discovered gravity when he saw an apple fall from a tree. According to his second law there had to be a force to make the apple go down. He decided to call this gravity. Then he thought what if the apple tree was twice as tall? Then gravity would reach up there too. That is how Sir Isaac newton discovered gravity.

## affects today

Urged on and funded by astronomer Edmond Halley, who was also at Cambridge observing the path of a now-famous comet, Newton dove into the study of gravitational force in the 1670s and '80s.

The result of Newton's research was his seminal work published in 1687, the Principia, considered by many as the greatest science book ever written.

Across the pages of the Principia, Newton breaks down the workings of the solar system into "'simple"' equations, explaining away the nature of planetary orbits and the pull between heavenly bodies. In describing why the moon orbits the earth (it's because the Earth is so much heavier), the book literally changed the way people saw the universe.