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Question about Gravitation

  1. Jul 7, 2016 #1
    1. The problem statement, all variables and given/known data
    Two bodies A and B having masses m and 2m respectively kept at a distance of d apart.
    A small particle is kept between A and B such that the net gravitational force on the particle
    is zero due to the bodies A and B . Its distance from mass A should be ?????

    2. Relevant equations

    3. The attempt at a solution
    x= distance of the particle from A
    after simplifying
  2. jcsd
  3. Jul 7, 2016 #2
    Remember that object A has mass m and object B has mass 2m. Try simplifying again and be more clear with how you represent your fractions.
  4. Jul 7, 2016 #3
    "the net gravitational force on the particle is zero"

    Where did you use this fact? Where is 0 in your equation?
  5. Jul 12, 2016 #4
    assume the particle is of negligable mass, then the equation for gravitational acceleration is : g = (G * M) / d^2
    use substitution, call the distance from A = 1, then find the distance B
  6. Jul 12, 2016 #5


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    Gold Member

    Why? It does not matter what its mass is, the acceleration would be the same.
    Mr.maniac called it x, which seems even better.
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