- #1
raniero
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Homework Statement
The given force F is equal to 5000N,γ=〖30〗^o and α=〖15〗^o.
The moment on member 4 is to be found.
The geometry of the structure was worked out separately.
Homework Equations
To solve the problem I tried to use the Equilibrium equations which state that forces in all directions should equal to zero and also that all moments should equal to zero.
The Attempt at a Solution
I tried to solve it by using equilibrium equations but force the three forces (which are equal), A, Fb and F32 resulted to zero.
I solved the problem graphically and these forces did not result to be equal to zero.
I solved the simultaneous equations using matrices with excel and the answers obtained are equal so I ruled out the possibility of a mathematical mistake.
What am I doing wrong here?
Any help would be greatly appreciated.
The equations of equivalence shown below and also the working of these equations are attached.