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Homework Help: Gravitational Force Problem

  1. Sep 21, 2007 #1
    1. The problem statement, all variables and given/known data

    M1 is a spherical mass (43.0 kg) at the origin. M2 is also a spherical mass (11.8 kg) and is located on the x-axis at x = 52.8 m. At what value of x would a third mass with a 16.0 kg mass experience no net gravitational force due to M1 and M2?


    2. Relevant equations

    F= G(m1 * m2)
    r^2


    3. The attempt at a solution

    G = 6.67*10-11, m1 = 43, m2= 11.8 and r^2 = 52.8 ...I plugged all of this in to solve for F, then I think I have to use this equation again and multiply the top by a m3 and solve for x using the F I found previous...is this right, if not could you help me out? Thanks
     
  2. jcsd
  3. Sep 21, 2007 #2

    learningphysics

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    Homework Helper

    suppose m3 is located at some value x that is between 0 and 52.8m.

    What is the force m1 exerts on m3? What is the force m2 exerts on m3? Take right to be positive... left to be negative.
     
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