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Homework Statement
A bridge, constructed of 11 beams of equal length and negligible mass, supports an object of mass as shown. Real bridges of this sort have steel rockers at the ends, these assure that the support forces on the bridge are vertical even when it expands or contracts thermally.
Assuming that the bridge segments are free to pivot at each intersection point, what is the tension in the horizontal segment directly above the point where the object is attached? If you find that the horizontal segment directly above the point where the object is attached is being stretched, indicate this with a positive value for . If the segment is being compressed, indicate this with a negative value for .
Homework Equations
[tex]\Sigma[/tex] [tex]\tau[/tex]=FrsinTheta
The Attempt at a Solution
I know that Theta equals 60Degrees but I'm not sure how to go about the problem. And from a previous problem: Fp=2mg/3 and Fq=mg/3
I assume I find the components of something but I don't know what.