Radius and circles.

  • Thread starter livblue23
  • Start date
  • #1
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Homework Statement


Communications satellites are placed in orbits such that they rotate the Earth once every 24.0 hours. Determine how high above the Earths surface these satellites must be placed.


Homework Equations


GM/4(3.14 squared) times T squared


The Attempt at a Solution


so i know that first i have to get the radius by using GM/4(3.14 squared) times T squared, and then subract the earths radius from that, but what would be the M in that equation?
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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Hi livblue23! :smile:

(have a pi: π :wink:)

I'm not sure what equation you're using,

but anyway M would be the mass of the Earth. :smile:
 

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