BRAINCAKEForces in Equilibrium
If an object on which forces are acting is held at rest then the resultant of these forces must be zero.
F1 + F2 + F3 = 0
Consider three forces, F1 , F2 and F3
If the vectors arrow are drawn end-to-end, if they form a closed triangle, then the resultant of the three forces is zero.
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Key terms in this lesson
- resultant
- The single force or vector that has the same effect as two or more forces or vectors acting together.
More in Forces and Motion
- Weight, Mass, Accleration
- Centre of Mass
- Free-Body Force Diagrams
- Drag and Terminal Velocity
- Moments and Equilibrium
- Couples and Torques
- Density and Pressure
- Pressure in Fluids and Archimedes Principle
All 17 lessons in Forces and Motion · All OCR AS-level Physics topics