Section 3.3: Newton's Universal Law of Gravitation

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6 Terms

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Newton

Proposed Gravity as the force that bends the paths of orbits to form ellipses

  • All material bodies have a general force of attraction → Greater the mass = Greater the attraction

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  • Fgravity=GM1M2/R^2

  • F = force between two objects

  • M2 and M2 are the masses of the two objects

  • R = their separation 

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Inverse-Square Law:

  • Gravitational force decreases with the square of the distance between the two objects → Gravity decreases with increasing distance 

  •  F = 1/r2

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“Lack of Gravity”

Not true, gravity is a constant force - can be found in small amounts 


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Free fall:

  • Falling accelerates at the same rate as they are moving sideways in their orbit 

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  • Newton’s Version of P2 = a3

  • P2=a3/M → Considers mass, makes it applicable to other systems where both masses are significant