Physics H - Universal Gravitation and Kepler's Laws

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5 Terms

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Gravity

the attractive force that exists between all objects

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Kepler’s laws of Planetary Motion

  1. plantes move in ellipses with the sun at one focus

  2. a planet covers the same amount of space in the same amount of time no matter where it is in orbit

  3. a planet’s orbital period is proportional to the size of it’s orbit (semi-major axis)

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Newton’s Law of Universal Gravitation

grav. force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers

F = m1 x m2 / r²

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What can r be replaced with in the formula?

“d”

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Eccentricity

the deviation of a circular orbit