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

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The problem involves calculating the moment of force on an L-shaped bracket about a specified axis. The initial attempt used the formula m = rf, resulting in a moment of 5 nm, but this was incorrect. The error lies in not considering that the 5.0 N force does not act perpendicular to the moment arm. To accurately calculate the moment, the angle between the moment arm and the force must be included in the cross product. Understanding this concept is crucial for solving torque problems correctly.
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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 5.0 N force is not acting perpendicular to the moment arm. Review the definition of how to calculate a moment.
 
The moment is a cross product, you haven't taken into account the angle between the moment arm and the force.
 

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