Phys2A_F07_Lecture_16

Phys2A_F07_Lecture_16 - Newton's Theory of Gravity When the...

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W. P. Beyermann Fall 2007 1 Newton’s Theory of Gravity • When the motion’s displacement is small relative to the distance between the object and the Earth, the gravitational force is directed downward and is approximately constant. • When the motion’s displacement is comparable to the distance between the object and the Earth, the force is given by Newton’s law of gravity.
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W. P. Beyermann Fall 2007 2 Published De Revolutionibus in 1543 Nicholas Copernicus Greeks & Ptolemy
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W. P. Beyermann Fall 2007 3 1546-1601 Tycho Brahe Mural Quadrant
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W. P. Beyermann Fall 2007 4 1571-1630 Johannes Kepler Mysterium Cosmographicum
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W. P. Beyermann Fall 2007 5 1. 2. 3. (orbital period) 2 ~ (semimajor axis) 3 Kepler’s Three Laws
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W. P. Beyermann Fall 2007 6 Sir Isaac Newton 1642-1727
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W. P. Beyermann Fall 2007 7 Gravitational Force Up to this point, the force of gravity was given as mg F g = This is only true for motion close to the surface of the earth.
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W. P. Beyermann Fall 2007 8 More generally, 2 2 1 21 12 r m Gm F F = = the force of gravity is an attractive
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This note was uploaded on 04/07/2008 for the course PHY 2A taught by Professor Beyermann during the Fall '08 term at UC Riverside.

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Phys2A_F07_Lecture_16 - Newton's Theory of Gravity When the...

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