H2 Physics 9478 · Topic 7
Circular motion: radians, angular velocity and inward force
Connect the geometry and timing of circular motion to a vector model in which the resultant acceleration and force point towards the centre.
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: Angular Displacement & VelocityNewton's Laws, Vectors & Problem Solving
How the ideas connect
- Angular displacement in radians
- Angular velocity and tangential speed
- Centripetal acceleration and radial force models
Learn in order
Lesson route
Objective clusters
- 01Angular displacement in radians 7(a)Learn and apply 1 reviewed syllabus outcomes in one coherent cluster.
- 02Angular velocity and tangential speed 7(b)–(c)Learn and apply 2 reviewed syllabus outcomes in one coherent cluster.
- 03Centripetal acceleration and radial force models 7(d)–(f)Learn and apply 3 reviewed syllabus outcomes in one coherent cluster.
Prove your understanding
Practice and repair
Key ideas and reference
Use this concise Circular motion: radians, angular velocity and inward force checklist to locate the right objective cluster. Full definitions, derivations and worked examples stay in the linked lessons.
- Connect the geometry and timing of circular motion to a vector model in which the resultant acceleration and force point towards the centre.
- Angular displacement in radians 7(a)
- Angular velocity and tangential speed 7(b)–(c)
- Centripetal acceleration and radial force models 7(d)–(f)
Course coverage and review details
The official topic states no explicit exclusions. Radial equations in this chain are always built from the real forces acting on the body; centripetal force is not added as a separate force.
Coverage is reviewed against 9478 topic 7(a)–(f), PDF page 16. Selected-response progress does not by itself prove constructed, diagrammatic or practical performance.
Reviewed 2026-08-01