Solve Torque Problem Homework: Finding Moment of Force on L-Shaped Bracket

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NoobeAtPhysics
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Homework Statement



Find the moment (vector) of the force acting on the “L-shaped”
bracket about the axis indicated.

2nusqxi.png


Homework Equations



m=rf

The Attempt at a Solution



Hypotenuse of triangle = sqrt(13)

Moment = sqrt(13)* 5 nm


This is a wrong according to my textbook however I do not understand why.
 

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The moment is a cross product, you haven't taken into account the angle between the moment arm and the force.