Sir Isaac Newton was born on January 4, 1642, in

the town of Woolsthorpe, near Grandtham in

Lincolnshire. English mathematician and scientist

who invented differential calculus and formulated

the theories of universal gravitation, terrestrial

mechanics, and color. His study on gravitation,

presented in Principia Mathematica (1687), was

supposedly inspired by the sight of a falling

apple. When he was three years old, his widowed

mother remarried, leaving him to the care of his

grandmother. He was soon then persuaded to go to

grammar school in Grantham after his mother was

widowed a second time. He was sent to Trinity

College, at the University of Cambridge in the

summer of 1661.

In 1665 he received his bachelors

degree. After an interval of nearly two years, to

avoid the plague, Newton returned to Trinity,

which elected him to a fellowship in 1667. He

received his masters degree in 1668. Newton

disregarded much of the established program of the

university to his own interests. Those were

mathematics and natural philosophy. Proceeding

entirely on his own, he investigated the latest

developments in mathematics and the new natural

philosophy that treated nature as a complex

machine.

Almost instantaneously, he made

fundamental discoveries that were instrumental in

his career in science. He died at the age of 84 on

March 20, 1727 at Kensington, London. Newtons

first law of motion is an object at rest or in

uniform tends to stay at rest unless acted on by

an outside force. Newtons second law of motion is

during the interaction of any two objects, the

mass times the acceleration of one object always

equals the mass times the acceleration of another

object. One Newton is the force needed to

accelerate one kilogram at the rate of one meter

per second squared. Newtons third law of motion is

for every action there is an equal and opposite

reaction.

The box is pushing down on the floor

with the same amount of force the floor is pushing

up on the box..

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