Need clarification about two-force member

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The discussion centers on the confusion regarding the direction of force vectors at point B in a two-force member scenario. One participant questions why the vector at support B points toward the applied force rather than in the opposite direction. Another clarifies that the free body diagram represents forces acting on the piece BD, where the lever pulls one way and the reaction force at the wall pulls in the opposite direction. This explanation resolves the confusion about the vector direction. Ultimately, understanding the free body diagram clarifies the relationship between the forces involved.
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I find it rather confusing that the vector emerging from the support of B is pulling to where the force is applied to. Can anyone clarify that for me?
 

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Dory said:
I find it rather confusing that the vector emerging from the support of B is pulling to where the force is applied to. Can anyone clarify that for me?

Hi Dory! :smile:

I don't understand what's worrying you :confused: …

the piece BD is being pulled one way by the lever, and the opposite way by the reaction force at the wall …

isn't that as it should be?​
 
Yes-- opposite reaction at the WALL, but check out point B -- if that hinge-point or screw wasn't there the lever would break apart to where the force is pulling at! So, shouldn't its vector also be pointing the opposite direction? Instead, it's pointing to where the force is pointing!

This is what confusing me...the fact that the B point is positive on the X axis and not negative
 
Yes, the force from the piece BD on the lever is to the left, and so the force on the piece BD from the lever is to the right …

the free body diagram is for forces on the piece BD. :confused:
 
Ohhhhhhhhhhhhhhhhhhhhhhhhh...done deal.*smacks forehead* Thanks.
 

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