physics

posted by bill

HELP PLEASE!!! A satellite moves in a circular orbit around Earth at a speed of 5085 m/s.
(a) Determine the satellite's altitude above the surface of Earth.
(b) Determine the period of the satellite's orbit.

  1. bobpursley

    centripetal force: mv^2/r

    where r is distance from CENTER of Earth.
    then set this equal to gravitational force

    GMem/r^2

    GMe/r^2=v^2/r solve for r, then subtract Radiusearth to get altitude.

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