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Can I use method of sections anywhere?

  1. Nov 28, 2013 #1
    1. The problem statement, all variables and given/known data

    Find the tension in the rope

    t8mbrd.png

    2. Relevant equations

    F=ma

    3. The attempt at a solution

    I was wondering whether I could use method of sections in this problem to divide the two systems so that I could find the tension in the rope.

    I have a strong feeling that I won't be able to.. why can't I?
     
  2. jcsd
  3. Nov 28, 2013 #2

    SteamKing

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    You don't need the method of sections. You just need to draw a FBD for the bar BD and then write the equations of static equilibrium.
     
  4. Nov 28, 2013 #3

    PhanthomJay

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    What you are calling "method of sections" is more generally referred to as "free body diagram(FBD)". You can take a FBD anywhere, but is is simplest to take one that cuts throught the rope, then apply Newton's laws for the equilibrium case (a = ??) .
     
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