Frames & Machines: Multi-Force Members

Inside this lesson

Distinguish a frame/machine from a truss, and a multi-force from a two-force member
Disassemble a pin-connected structure into per-member free-body diagrams
Apply action-reaction discipline: pin forces are equal and opposite on the two members
Solve a two-member frame for its support and pin reactions

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Educational content covering topics typical of a first- and second-year mechanical engineering curriculum. Not a substitute for accredited coursework, and not suitable for real structural design without review by a licensed professional engineer.