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Finding forces on bolted platform (torques/forces)

  1. Nov 6, 2011 #1
    1. The problem statement, all variables and given/known data
    1zbt5d0.png

    2. Relevant equations
    ƩF = mA
    T=rxF


    3. The attempt at a solution
    Using sum of forces, I found:
    ƩF=mA
    150lb + 50lb - F1 - F2 = 0
    (calling the support on the right "1") ƩT1 = 0

    But I'm a little confused on where to go from this point. Any advice?
     
  2. jcsd
  3. Nov 6, 2011 #2
    Look at each of the two supports individually. What forces act on each?
     
  4. Nov 6, 2011 #3
    That would be the upward force of the board due to the torque at support 1, minus the force of the bolt holding the board to the support, correct?
     
  5. Nov 6, 2011 #4
    And what can you say about the sum of the torques?
     
  6. Nov 6, 2011 #5
    The sum of the torques, because there is no motion, will equal zero. Would it be correct to say the following...?
    ƩT=0
    0=(150lb)(2ft)-(50lb)(1ft)+(F2)(3ft)
    F2=83.3lb
     
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