Statics › Section C · Equilibrium of particles › Topic C.1
Equilibrium, particles, and free-body diagrams
Every statics problem starts the same way: decide what body you are studying, cut it free from its surroundings, and draw every force that acts on it. This topic defines equilibrium and the particle model, and teaches the free-body diagram that every later topic relies on.
In this topic
- What statics studies
- Equilibrium means zero acceleration
- What makes a particle
- One equation per dimension
- Space diagrams and free-body diagrams
- Drawing a free-body diagram in five steps
- Forces you will draw most often
- Unknown directions and internal forces
- Worked example: a sign on two cables
- Worked example: two pots on chains
- Common mistakes to avoid
- Key takeaways
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