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Homework Help: Combined gravitational field strength

  1. Mar 17, 2010 #1
    1. The problem statement, all variables and given/known data

    2 masses, 5k and 10kg are fixed in place at the coordinates 1,0 and 1,1 respectively. what combined gravitational field strength do they produce at the point 0,0?

    2. Relevant equations

    g = GM/r^2

    3. The attempt at a solution
    total g = G(5)/(1)^2 +G(5)/2
    not the right answer though -- answer is 6.16 X 10^-10 @ 22.5 degrees
    plz help!!
  2. jcsd
  3. Mar 17, 2010 #2


    User Avatar
    Homework Helper

    Re: gravity

    You can't add them like that because the 2 fields point in different directions. You have to add them vectorially, using the Pythagorean theorem.
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