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Are the sum of all forces written correctly for this system?

  1. Apr 4, 2016 #1
    • Member advised to use the formatting template for questions posted to the homework forums
    Can someone check if my Sum of All Forces is setup correctly?

    Problem:
    7b189141b5.jpg

    Diagram:
    http://puu.sh/o6pLY/285d7b12c1.jpg [Broken]

    Sum of all Forces:
    2e23f577b3.jpg
     
    Last edited by a moderator: May 7, 2017
  2. jcsd
  3. Apr 4, 2016 #2

    SammyS

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    You're missing a force in Σ FxB, namely the component of weight in the x direction.
     
    Last edited by a moderator: May 7, 2017
  4. Apr 4, 2016 #3
    Σ FxB: -mgsin(30 degrees) + T2 - T1 - μkmgcos(30 degrees) = ma

    Thank you.

    and all ma = 0 since velocity is constant
     
  5. Apr 4, 2016 #4

    SammyS

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    By the way: Why 30° ?
     
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