1. Limited time only! Sign up for a free 30min personal 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!

Satellite and gravitational force

  1. Jul 20, 2011 #1
    a 500 kg satellite experiences a gravitational force of 3000 N, while moving in a circular orbit around the earth.
    a: find the radius of the circular orbit
    b: find the speed of the satellite
    c: find the period of the orbit

    attempt

    a:
    g= GM/r^2
    r=sqrt(GM/g)
    r= 3.33 x 10^-6 m

    am i right?
     
  2. jcsd
  3. Jul 20, 2011 #2
    Think about your answer for a second... does 10^-6m make any physical sense?
     
  4. Jul 20, 2011 #3
    not at all...where did i go wrong?
     
  5. Jul 20, 2011 #4
    Your equation is missing a term for the mass of the satellite:

    [tex] F_{G} = \frac{GMm}{r^{2}} [/tex]
     
  6. Jul 20, 2011 #5
    thanks a lot!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Satellite and gravitational force
  1. Satellite Gravitation (Replies: 2)

Loading...