- #1
ErLupo
- 4
- 0
Homework Statement
Determine the force in member BE of the loaded
truss.
See the attached picture.
Homework Equations
Sum of the Moments = 0
Sum of the Forces = 0
The Attempt at a Solution
[/B]
Sum moments about A to get:
-12L - 56L +40Dy = 0
Dy=1.7L
Sum the forces in the y direction:
Ay + Dy - L - 2L = 0
Ay = 1.3L
Cut through BC, BE, and FE at "Q"
Then sum the forces in the y direction:
-BEsin(θ) + Ay - L = 0
BE=.3L/sin(θ)
I'm really at a loss at how to get theta. The main problem I have is determining the horizontal distance between B and F. I am unable to determine what that distance is. If I had that distance I believe I could use the Law of sines and subsequently find theta.
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