Lecture 6﷓1 ﷓ Introduction to Structural Analysis STUDENT ...

a. each free body has four unknown forces and only three equations of. equilibrium are available. b. together, however, there are six unknowns and six equations of. equilibrium (3 for each member) c. summing moments about point A for member AC and summing moments about. point B for member BC we obtain two equations with two unknowns Cx. and Cy ................
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