Statics › Section C · Equilibrium of particles › Topic C.4
3D particle equilibrium
Real cables, guy wires and tripod legs rarely lie in one plane. In three dimensions a particle gives three equilibrium equations, and the forces are written from the coordinates of the points they run between.
In this topic
- Three equations in space
- A right-handed frame
- Writing a force from two points
- Direction cosines
- The procedure
- Worked example: a crate on three cables
- Solving the system
- Worked example: a camera tripod
- Zeros and symmetry help
- Common mistakes to avoid
- Key takeaways
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