Chapter 12.2 - PH 2223 Gravitation (Chapter 12) Last...

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1 PH 2223 Gravitation Last lecture: Gravitational Force G vs g Today (8/21/2008): Gravitational Force Gravitational Potential Energy U and F for Arbitrary
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2 Gravitational Force Put origin on mass (point) of interest . Use same origin for all. Measure θ from Get ± sign from ( (-, ( ( = vector of length 1 in = vector of length 1 in
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3 Problem Four identical masses of 800 kg each are placed at the corners of a square whose side length is 10.0 cm. What is the net gravitational force (magnitude and direction) on one of the masses (A) A C B D
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4 Problem A C B D
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When only conservative forces act upon an isolated system, energy is conserved, i.e., gain (loss) of kinetic energy equals loss (gain) of potential energy. The change in the potential energy is the The change in the potential energy is the negative of the work done by the force. negative of the work done by the force. ΔU = - W ΔU = - W Consider a mass m moving from point A to point B in the Gravitational Potential
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The work done for any force is Gravitational force always along r direction in this Units of U are Gravitational
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This note was uploaded on 09/21/2008 for the course PH 2223 taught by Professor Monts during the Fall '08 term at Mississippi State.

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Chapter 12.2 - PH 2223 Gravitation (Chapter 12) Last...

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