Need clarification about two-force member

  • #1
Femme_physics
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Main Question or Discussion Point

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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  • #2
tiny-tim
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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?
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?​
 
  • #3
Femme_physics
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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
 
  • #4
tiny-tim
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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:
 
  • #5
Femme_physics
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Ohhhhhhhhhhhhhhhhhhhhhhhhh...done deal.*smacks forehead* Thanks.
 

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