Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Satellite Problems

  1. Nov 12, 2006 #1
    We just started the chapter on circular motion. I am trying to find the velocity of a satellite 3600 km above earth. I came up with v= square root of (g)(Mearth/R). Is this correct? I tried V= 2(pie)R/T, but that didn't give me the correct answer.
  2. jcsd
  3. Nov 12, 2006 #2


    User Avatar
    Science Advisor
    Homework Helper

    Yes, that is correct. Keep in mind that you need the radius in that equation, not the height above the Earth. You need to add the radius of the Earth to your altitude.
  4. Nov 12, 2006 #3
    Thank you so much!
  5. Nov 12, 2006 #4
    and also, if I wanted to find the force between the earth and the satellite, would i use the equation for Force Centripital or Force of Gravity?
  6. Nov 12, 2006 #5


    User Avatar
    Homework Helper

    Think about it... Didn't you just state before that both equations are equal?
  7. Nov 12, 2006 #6
    o i see... thanks!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook