Statics forces acting on supports

  • Thread starter jimbo71
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  • #1
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Homework Statement


see attachement


Homework Equations


sum of Fx=0
sum of Fy=0
sum of M=0


The Attempt at a Solution


There are 4 forces that I have found. 12W acting in the negative y direction at A. 3W acting in the negative direction acting 2 feet from pt B. A F acting in the positive y direction from point A and a F acting in the positive direction from point B.
Ay+By-12W-3W=0.
Ay+By=3036lb/ft

Obviously I need a second equation to solve for Ay and By. I'm not sure what other forces I can sum up. I think somehow I want to incorporate a moment force but I don't know what it would be.
 

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Answers and Replies

  • #2
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?????
 
  • #3
tiny-tim
Science Advisor
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Hi jimbo71! :smile:

I can't see your diagram yet, so I'm only guessing …

but there's probably no "moment force" - you just choose a point, and take moments of all the ordinary forces about that point, and equate it to zero. :wink:
 

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