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: Gravitational field, density and mass.

  1. Jul 23, 2008 #1
    A satellite orbits a planet. The gravitational field strength at the radius of the orbit is 12 N/kg. What will the gravitational field strength at the position of the satellite be if
    - The planet's density is doubled?
    - The satellite's mass is doubled?

    I just don't understand their relationship. Any help is appreciated =)
     
  2. jcsd
  3. Jul 23, 2008 #2
    Do you know the formula for gravitational force?
     
  4. Jul 23, 2008 #3
    F = Gm1m2/r^2
    but doubling the mass doesn't double the force.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook