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: Circular motion/gravitation

  1. Oct 12, 2008 #1
    1. The problem statement, all variables and given/known data

    A satellite orbits earth at an altitude of 325 km above the planet's surface. what is the oribital period? (radius of earth =6.38 x 10 ^ 6 meters, mass of earth = 5.98 x 10^24 kg)


    2. Relevant equations

    Net force = 4 pi^2r/T^2 Fg=Gm1m2/r^2


    3. The attempt at a solution


    4pi^2r/T^2 = gm1m2/r^2
     
  2. jcsd
  3. Oct 12, 2008 #2

    Andrew Mason

    User Avatar
    Science Advisor
    Homework Helper

    This is not correct. Check the dimensions. This has the dimensions of distance/time^2.

    Fix that and you will have the problem solved.

    AM
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook