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Torque magnitudes

  1. Mar 27, 2015 #1
    1. The problem statement, all variables and given/known data

    Six forces, each of magnitude either F or 2F, are applied to a door as seen from above in the figure.
    Rank in order, from smallest to largest, the six torques τ1to τ6 about the hinge.
    2. Relevant equations
    torque=RFsintheta

    3. The attempt at a solution
    τ1 = F*L/2
    τ2 = 2F*L/4
    τ3 = F/√2*L/2
    τ4 = F/√2*L/2
    τ5 = 2F*L
    τ6 = 0

    Thus, 1 and 2 and 3 and 4 are equal

    Here is my answer, but apparently it is wrong. Any tips?

    torque_zpsn1cj5b6p.png
     
  2. jcsd
  3. Mar 27, 2015 #2

    BvU

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    Where's the door and where's the hinge ?
     
  4. Mar 27, 2015 #3

    SteamKing

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    You're saying that 2F*L < F*L/2, which seems a bit odd if the magnitudes of both F's and both L's are the same.
     
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