9702 · 4.2
Equilibrium of Forces
Master equilibrium for Cambridge 9702 Paper 2: zero resultant force, zero resultant torque, principle of moments, couples, and the triangle of forces — with Senpai Corner diagrams and live animations.
Need to know
What you need to know
- **Resultant force = 0** — no net push or pull (translational equilibrium).
- **Resultant moment = 0** — no net turning effect about any pivot (rotational equilibrium).
- Both must hold at the same time for complete equilibrium.
Explanation
Equilibrium of Forces
- **Resultant force = 0** — no net push or pull (translational equilibrium).
- **Resultant moment = 0** — no net turning effect about any pivot (rotational equilibrium).
- Both must hold at the same time for complete equilibrium.