H2 Physics 9478 · Topic 2
Forces & Moments: interactions and equilibrium
Represent every interaction first, then connect force laws, turning effects and equilibrium with consistent diagrams.
Before you begin
Study each reviewed objective cluster, then use the recorded diagnostic and repair plan. H2 practice evidence remains separate from H1 and H3.
Be comfortable with: Vector Addition & ComponentsTorque & Couples
Learn in order
Lesson route
Prove your understanding
Practice and repair
Key ideas and reference
Use this concise Forces & Moments: interactions and equilibrium checklist to locate the right objective cluster. Full definitions, derivations and worked examples stay in the linked lessons.
- Represent every interaction first, then connect force laws, turning effects and equilibrium with consistent diagrams.
- Complete Forces & Moments: interactions and equilibrium lesson
Course coverage and review details
For friction and viscous force, qualitative treatment is required; coefficients of friction and viscosity are excluded.
Coverage is reviewed against 9478 topic 2(a)–(i), PDF page 12. Selected-response progress does not by itself prove constructed, diagrammatic or practical performance.
Reviewed 2026-08-01