in the following question it is known that the rod BD has only axial internal forces, (which i called Q) if AL(adsbygoogle = window.adsbygoogle || []).push({}); ^{2}=10*I, find the reaction at C and the internal force Q.

Assume that the energy of normal forces is negligible compared to moment where there are both.

instead of using L/4 i defined L/4=a

the correct answers are supposed to beCy=0.346PandQ=0.042P

these are my calculations

i have tried solving it 4 times now and cant get the correct answer.

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# Homework Help: Castiglianos second theorem for indeterminate structures

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