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Torque magnitudes

  • Thread starter Steelers72
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  • #1
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Homework Statement



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.

Homework Equations


torque=RFsintheta

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
 

Answers and Replies

  • #2
BvU
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Where's the door and where's the hinge ?
 
  • #3
SteamKing
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Homework Statement



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.

Homework Equations


torque=RFsintheta

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?
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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