Help. Shear force and bending moment problem makes no sense

AI Thread Summary
The discussion centers on a misunderstanding of a shear force and bending moment problem, emphasizing that the real task involves creating separate free body diagrams. The poster is confused about how cutting the cable and removing supports affects forces and moments, mistakenly believing it leads to equilibrium. It is clarified that despite changes in length, the goal is to ensure that all free bodies are in equilibrium by summing forces and moments. The importance of following problem-solving directions is highlighted to achieve the correct solution. The discussion reinforces the need to focus on equilibrium rather than the effects of cutting the mechanism.
Blugga
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Homework Statement



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Homework Equations



ƩFx=0
ƩFy=0
ƩMo=0

The Attempt at a Solution



I have no clue. By cutting the pieces, it changes the length. By cutting the cable at c and removing the 2 supports, wouldn't it make all the forces and moments = 0?
 
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Regardless of what the subject line says, this is not a problem about shear force and bending moments. It is a problem about splitting up the mechanism in the diagram into a series of separate free body diagrams.

I urge the poster to follow the directions and then see if all forces and moments = 0.

It doesn't matter if the cuts change the length (which length?) The final result should be that all of the separate free bodies, after adding the necessary forces and moments, are in equilibrium.
 
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