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There are two charges with charge q and mass m

  1. Mar 26, 2017 #1
    There are two charges with charge q and mass m and they are in equilibrium. Then, in the diagram why is my teacher saying that electrostatic force(F)=mg? Below is diagram.
    HligTNMrjbquMH3pO78b-yP0kzKbEocKeoElM55wdsd2SCLJ6uBgCnP8I5bFn1YdQdXBTeQeeh041rGwng=w1177-h662-no.jpg

     
  2. jcsd
  3. Mar 26, 2017 #2

    TSny

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    Welcome to PF! When posting a question, please follow the guidelines and fill out all parts of the question template. See https://www.physicsforums.com/threads/guidelines-for-students-and-helpers.686781/

    OK, you've started with a diagram that correctly shows the gravity force and the electric force. It might help to also show any other forces acting on the particle.

    What does "equilibrium" mean in terms of the forces?
     
  4. Mar 26, 2017 #3
    Equilibrium means net force is zero, right?
     
  5. Mar 26, 2017 #4

    TSny

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    Yes. That's right. If you added (head-to-tail) the force vectors acting on the particle, what would the diagram look like?
     
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