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Tension in braces

  1. Oct 22, 2007 #1
    1. The problem statement, all variables and given/known data

    What should be the tension in the wire used in teeth braces be, given that the net force exerted on the tooth has to be 0.7806 N? The angle between the two forces is 156.5°.

    2. Relevant equations

    I think we may have to find the centre of mass

    3. The attempt at a solution

    I really am clueless as to how to approach this.
  2. jcsd
  3. Oct 22, 2007 #2


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    Staff Emeritus
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    Gold Member

    You need to draw a picture (the free body diagram for the tooth). After that, it's much easier.

    Look at this picture (for instance): http://www.drmehan.com/inovationclear (Small).jpg

    Draw the top view and zoom in on a single tooth. The angle between the left and right sections of wire is given to you.
    Last edited: Oct 22, 2007
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