![]() Newton's first law of motion, one of three, states that anobject at rest will stay at rest unless acted upon by an outside force. "I?m pretty sure that Sir Isaac would have loved to seethis, assuming he wasn?t space sick, as it would have proved his first law ofmotion to be correct," Sellers said in a statement. A portrait of Newton is also packedalong with the apple tree shard among Sellers' official flight luggage. He was buried in Westminster Abbey in London.Newton is a former president of the Royal Society, which iscelebrating its 350th birthday this year. In 1727, at age 84, Sir Isaac Newton died in his sleep. He was the head of the Isaac Newton Institute in Cambridge, England. When someone was caught making fake coins, they were sometimes sentenced to death. At one point, he led the British Mint, which is the part of government that makes coins for the country. When he was older, Newton worked in British government. He sometimes tried to ruin their work, Rees says. When he was older, he was not kind to other scientists. As a young man, Newton preferred being alone. Still, "everyone knew that it was a great work." Perceptions of Isaac Newton Newton made many discoveries, but he wasn't well-liked. When it came out, not many people read or understood the book, mathematician Robert Wilson says. Usually people just call it the Principia. Newton's Published Work Newton published his findings in 1687, in a book called Philosophiae Naturalis Principia Mathematica. Third Law of Motion: Action and Reaction For every action there is always an equal and opposite reaction. This idea can also be written as force equals mass times acceleration, or F = ma. The acceleration will happen in the same direction as the force. Acceleration is the change of an object's speed. Second Law of Motion: Acceleration An object will accelerate if force is applied to it. An object that is moving will keep moving along a straight line unless an outside force is applied to it. First Law of Motion: Inertia An object that sits still will remain still unless a force is applied to it. These laws changed all of science, and are still used by scientists today. Following his apple idea, Newton wrote three laws of motion. Newton used his knowledge of light to make better telescopes. It is actually a mix of all the colors of the rainbow. He found out that white light is not just white. Newton also studied optics, the science of light. Newton's ideas in calculus are still used today. A rate is the measurement of how much something changes. This is a mathematical subject that studies rates. Newton Changes Science Forever The theory of gravity was just one of Newton's discoveries. In 1667, he went back to Cambridge and became a math teacher until 1696. This is when he got his apple-falling idea. This deadly disease killed thousands of people. In 1665, the school closed for a time because of the bubonic plague. At first, he did not stand out as a student. In 1661, Newton went to the University of Cambridge. It was even powered by a mouse running in a wheel. Newton's Schooling Newton was born on January 4, 1643, in Lincolnshire, England. ![]() The Royal Society is the United Kingdom's national academy of science. He was president of Britain's Royal Society. Newton showed that gravity even makes the moon circle around Earth, and Earth around the sun, Martin Rees says. Why didn't it fall sideways, or even up toward the sky? Gravity does not just make apples fall from trees. He wondered why the apple fell straight down. Some say that Newton came up with his ideas about gravity after watching an apple fall. There are different types of forces, but this one is called gravitational. The bigger the body, the stronger the force. A force is a push or pull in a certain direction. He came up with the idea that every physical object, whether it's a person, an apple or a planet, exerts a force on other physical objects. Newton created the theory of gravity around 1665 or 1666. But he was a giant in the world of science. ![]() Sir Isaac Newton was a tiny man in real life.
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