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17-1 Physics I Class 17 Newton’s Theory of Gravitation

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17-2 Forces Known to Physics

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17-3 Forces in Physics 1 (so far)

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17-4 Newton’s Theory of Gravitation

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17-5 Newton’s Law of Universal Gravitation

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17-6 Properties of Gravity

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17-7 If Gravity Varies As 1/r 2, Where Does g = 9.8 m/s 2 Fit In?

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17-8 Gravity is a Conservative Force

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17-9 We Have Two Formulas for Gravitational Potential Energy!

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17-10 Class #17 Take-Away Concepts

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17-11 Class #17 Problems of the Day

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17-12 Class #17 Problems of the Day

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17-13 Activity #17 Gravitation

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17-14 Class #17 Optional Material Part A - Kepler’s Laws of Orbits Material on Kepler’s Laws thanks to Professor Dan Sperber

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17-15 Kepler’s Three Laws of 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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17-16 Kepler’s Three Laws of Planetary Motion

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The Law of Areas

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The Law of Periods

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ENERGY IN CIRCULAR ORBITS

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17-20 Class #17 Optional Material Part B - General Relativity Material on General Relativity thanks to Albert Einstein

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17-21 Where Did Newton Go Wrong? (Again!)

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17-22 The Principle of Equivalence

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17-23 The Principle of Equivalence

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17-24 General Theory of Relativity

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17-25 Black Holes

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17-26 If Newton’s Gravity isn’t true, why do we still use it? Massive Black Holes In Galaxies NGC 3377, NGC 3379 And NGC 4486B

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