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Calculate Torque

  1. Nov 6, 2008 #1
    1. The problem statement, all variables and given/known data

    Two people are holding up the ends of a 4.55-kg wooden board that is l = 1.90 m long. A m = 5.00-kg box sits on the board, 0.50 m from one end, as shown below. What forces do the two people exert?


    2. Relevant equations

    T=F*d

    3. The attempt at a solution
    4.55*9.8=44.59N
    5*9.8=49N
    49N+44.59N=93.59N=Total Force

    Length(left)=1.4m Length(right)=.5m


    I am unsure how do you calculate the force each person exerts, or if I am missing an equation
     
  2. jcsd
  3. Nov 6, 2008 #2

    hage567

    User Avatar
    Homework Helper

    The total force is not just the sum of the weights. If the board is being held up, each person will exert a force on the board in the upwards direction. So you have four forces to sum up, not two. You also need to sum up the torques by picking one point to be your pivot point (it would be convenient to pick one of the points where a person is holding the board). This will give you two equations to work with.
     
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