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Homework Help: Electrostatic force question

  1. Feb 25, 2015 #1
    First off idk if this is the right topic to post in but I've been at this problem for hours and I have no idea how to solve it.

    Three metal spheres are situated in positions forming and equlateral triangle with sides of 0.012 m. X has a charge of -2.5 C. Y has a charge of 3.00 C. Z has a charge of 4 C. Calculate the electrostatic force on the Y charge.

    I have tried calculating Fxy and Fzy and adding those values together but i get the wrong answer. I also have no idea of the angle
  2. jcsd
  3. Feb 25, 2015 #2


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    What don't you understand about equilateral triangles? :frown:

    Since you know the location of each charge relative to one another, the electrostatic force between them should be treated like a vector: magnitude and direction.
  4. Feb 25, 2015 #3


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    Hello Lana, welcome to PF :smile:
    Cold you post your work ? we might be able to see where it goes wrong -- if at all (book answers aren't always the right answers!)
  5. Feb 25, 2015 #4


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    For future reference, this belongs in Introductory Physics, not Advanced.
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