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Elliptical Orbits. Cali & Paul. Definition. Elliptical Orbits  An elliptical orbit that has an eccentricity less than 1 and is also known as a Kepler orbit. Definition Cont.

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Elliptical orbits

Elliptical Orbits

Cali & Paul


Definition
Definition

  • Elliptical Orbits  An elliptical orbit that has an eccentricity less than 1 and is also known as a Kepler orbit


Definition cont
Definition Cont.

  • Ellipse: An oval-shaped curve that is a path of a point that moves such that the sum of its distances from two fixed points (foci) is constant.

  • Foci: One of the two points for which the sum of the differences to any point on the ellipse is a constant.

    • Ex  A satellite orbiting Earth moves an ellipse that has Earth as one focus.


Question
Question

  • The orbit of a satellite is shown in a sketch. In which of the positions A through D does the satellite have the greatest speed? Least speed?

C

D

B

A


Answer
Answer

  • Position A because the satellite gains momentum as it begins its orbit and as it descends back to its original point, its momentum is greatest.


Answer cont
Answer Cont.

  • Position C because the satellite gains momentum as it begins its orbit and as it enters the middle of its orbit, its speed is least.


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