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Static Equilibrium Problem involving Moments

  1. Jul 7, 2016 #1
    Capture.PNG
    Equations: Net torque=0=Net force
    I believe this is a static equilibrium question but cant figure out how to do it
     
  2. jcsd
  3. Jul 7, 2016 #2
    The net force on the x-axis must be zero. What equation can you make from this fact?

    Also the net torque is zero. Take the torques around the A point. What equation can you make?

    Solving these two equations with two unknowns (F_x and the force from cable ) will get you the result.
     
  4. Jul 7, 2016 #3
    New%20Doc%2014_1.jpg
    this is what i have split the forces as till now,
    somehow i cant get them to cancel
     
  5. Jul 7, 2016 #4
    You get involved with the forces along the line of the 80Kg rod, that's not what you should do, the x-axis is not the line of the 80Kg rod, the first picture at OP shows which are the x -axis and the y-axis.

    In the y-axis you got the weights of the rod and the mass m, 80Kg and 10Kg respectively (and the F_y component of the force from wall at A).
    In the x-axis you got F_x and the tension T from the cable.
     
  6. Jul 7, 2016 #5
    ah got it thank you
     
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