AS101 Lecture 10

AS101 Lecture 10 - AS101 Lecture 10 Logistics Do not forget...

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AS101 Lecture 10 Logistics: Do not forget Night Lab Homework 3 due today. Homework 4 available Last Lecture: Kepler Galileo Today’s Lecture: Newton
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Isaac Newton (1642-1727) Greatest Scientist in History History Born middle class Educated in Oxford Fled the Plague in 1665 Reinvented the Universe by 1667 Major Inventions & Discoveries 3 Laws of Mechanics Calculus Law of Gravity Nature of white light Reflecting telescope
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Isaac Newton (1642 - 1727) Born Dec 25, 1642 (the year Galileo died - “God’s Christmas gift to mankind”) (January 4, 1643, by Gregorian calendar adopted in England in 1752) 1665/6: Discovered the Law of gravity, but very secretive - did not tell anyone for 20 years 1669: Became Lucasian Professor of Math at Cambridge
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Revolutionary text In 1687 Newton published Principia which included his universal law of gravitation and the three laws of motion http://www.library.usyd.edu.au/libraries/rare/modernity/newton5.html
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Newton’s First Law of Mechanics In the absence of a net force, an object moves with constant velocity. Mathematically: If F =0 then v =constant where F is the force and v is the velocity. Objects travel in straight lines unless acted upon Friction is a force Principia Mathematica (original 1687 edition)
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