Why was the thickness of the beam included in calculating this moment?

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    Beam Moment Thickness
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SUMMARY

The thickness of the beam is crucial in calculating the moment because it influences the beam's resistance to bending and the distribution of stress. The horizontal component of the 600 N force is used to determine the effective lever arm, which is essential for accurate moment calculations. The discussion emphasizes that the angle of force application affects the moment arm length, particularly when considering the vertical lever distance of 0.2 m. Understanding these principles is vital for structural analysis and design.

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Homework Statement
Determine the horizontal and vertical components of reaction on the
beam caused by the pin at B and the rocker at A as shown in Fig. 5–12a.
Neglect the weight of the beam.
Relevant Equations
M = Fd
Hi all,

Why was the thickness of the beam considered when moment was being calculated and why was the horizontal component of the 600 N force used in calculating the moment? That part is unclear to me. Please explain it. Am I looking for the logic behind using the horizontal comp. and the thickness value for moment. Are we saying that a force applied at an angle causes some change in thickness of the beam? Please see attached picture below
1667585191313.png
 
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Because the point of application of the diagonal force has a vertical lever (0.2 m) that should be considered.
For the horizontal component to truly be aligned with pivot A or B, the line of application of the force should be extended until crossing the A-B line.
If that happens, the lever of the vertical component would increase to be greater than 2 meters.
 
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