1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Kelper's laws problem

  1. Feb 28, 2008 #1
    1. The problem statement, all variables and given/known data
    A satellite moves in a circular orbit around Earth at a speed of 4505 m/s.

    a) Determine satellite's altitude above surface of the Earth.
    b) Determine the period of satellite's orbit.


    2. Relevant equations
    I'm not sure about equations for the altitude, but I know the period has something to do with Kelper's laws &

    T^2=(4pie^2/GMe)r^3=KeR^3


    3. The attempt at a solution
    My attempt was to use the above equation with G=6.67x10^-11 & Me=6378.1
    It wasn't right.
     
    Last edited: Feb 28, 2008
  2. jcsd
  3. Feb 28, 2008 #2

    Kurdt

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    I think this will probably have more to do with circular motion than Kepler's laws.
     
  4. Feb 28, 2008 #3

    D H

    User Avatar
    Staff Emeritus
    Science Advisor

    What units are those numbers in? You have to make sure the values you use are consistent with respect to units. Those numbers are not.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?