Physics I Class 17

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Physics IClass 17
Newtons Theory of Gravitation
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Forces Known to Physics
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Forces in Physics 1(so far)
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Newtons Theory of Gravitation
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Newtons Law ofUniversal Gravitation
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Properties of Gravity
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If Gravity Varies As 1/r2,Where Does g 9.8
m/s2 Fit In?
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Gravity is aConservative Force
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We Have Two Formulas for Gravitational Potential
Energy!
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Class 17Take-Away Concepts
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Class 17Problems of the Day
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Class 17Problems of the Day
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Activity 17Gravitation
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Class 17 Optional MaterialPart A - Keplers
Laws of Orbits
Material on Keplers Laws thanks to Professor
Dan Sperber
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Keplers Three Lawsof Planetary Motion
1. The Law of Orbits All planets move in
elliptical orbits having the Sun at one focus. 2.
The Law of Areas A line joining any planet to
the Sun sweeps out equal areas in equal times. 3.
The Law of Periods The square of the period of
any planet about the Sun is proportional to the
cube of the semi-major axis of its orbit.
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Keplers Three Lawsof Planetary Motion
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The Law of Areas
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The Law of Periods
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ENERGY IN CIRCULARORBITS
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Class 17 Optional MaterialPart B - General
Relativity
Material on General Relativity thanks to Albert
Einstein
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Where Did Newton Go Wrong?(Again!)
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The Principle of Equivalence
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The Principle of Equivalence
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General Theory of Relativity
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Black Holes
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If Newtons Gravity isnt true, why do we still
use it?
Massive Black Holes In Galaxies NGC 3377, NGC
3379 And NGC 4486B