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Gravitational Force of Particles

  1. Apr 9, 2016 #1
    1. The problem statement, all variables and given/known data
    There are three particles;
    1) 26kg at 12i-hat
    2)13kg at -5j-hat
    3)13 kg at 5j-hat

    A) What is the gravitational force on the 26kg mass due to the 13kg mass at -5j-hat

    2. Relevant equations
    F= GMm/r^2

    3. The attempt at a solution
    A) IN COMPONENTS;
    Y Component
    F=6.67E-11(13)(26)/5^2
    9.01E-10 j-hat
    X Component
    F=6.67E-11(13)(26)/12^2
    =1.57E-10 i-hat

    I have solved this problem before in the exact same way and gotten the correct answers. I don't know why there answers are incorrect. Could someone point it out please? Thanks.
     
  2. jcsd
  3. Apr 9, 2016 #2
    −1.2E−10i-hat −5.1E-11 j-hat

    Correct answers...
     
  4. Apr 9, 2016 #3
    Still unsure how the attempt to solve is wrong, help please?
     
  5. Apr 9, 2016 #4
    @heartshapedbox
    Is the distance between the objects 5j, 12i, or some other number?
     
  6. Apr 10, 2016 #5
    Yes that's the distance!
     
  7. Apr 10, 2016 #6

    haruspex

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    No it isn't.
    If fred is 3 m in front of you and Ella is 4m to your right, how far apart are Fred and Ella?
     
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