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SIR ISAAC NEWTON

SIR ISAAC NEWTON. ~ a brief biographical sketch by ~ Carl J. Wenning. Sir Isaac Newton. English scientist and mathematician Born: Woolsthorpe, Lincolnshire, December 25, 1642 (Julian Calendar) Died: London, March 20, 1727. Most notable accomplishments.

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SIR ISAAC NEWTON

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  1. SIR ISAAC NEWTON ~ a brief biographical sketch by ~ Carl J. Wenning

  2. Sir Isaac Newton • English scientist and mathematician • Born: Woolsthorpe, Lincolnshire, December 25, 1642 (Julian Calendar) • Died: London, March 20, 1727

  3. Most notable accomplishments • “Invention” of the reflecting telescope • Laws of motion • Law of universal gravitation • Principia Mathematica

  4. Additional Background • Un-notable childhood • Graduated Cambridge 1665 without distinction • Went to mother’s farm due to plagues and began to wonder about gravity • Wondered about acceleration due to gravity for both moon and apple

  5. Cogitation Cogitation • How does acceleration of the relate to the acceleration of the ? • a = v2/d and a = 9.8m/s2 • But v = 2pd/t = where d = 60r • Now, a /a = 3,600 = 602! • Therefore, a is proportional to d2 !

  6. Verification • From Kepler’s observation, • Now if law of gravitation is correct, then • Which reduces to Kepler’s third law! • That is, KIII holds simply because:

  7. Newton… • Announced law of gravitation only 15 years later due to uncertainty of equivalency. • Study of light (spectra) and optics (lenses) • Invents telescope to avoid chromatic abber. • Developed calculus to see if gravity like pt. • Enunciated three laws of motion • Mathematical Principles of Natural Philos.

  8. Because of criticism… • Began to live the life of a recluse • Worked on transmutation of lead • Appointed warden of Royal mint • Calculated insurance tables • Elected president of Royal Society in 1703 (after the death of Hooke, the so-called universal claimant) • Now buried in London’s Westminster Abbey

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