3D Equilibrium

Inside this lesson

Write the six 3D equilibrium equations (three force components, three moment components)
Recognize when symmetry lets you skip full vector algebra
Use a position vector and the cross product to compute a moment in 3D
Solve a simple symmetric 3D support problem

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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.