G3 Physics / O-Level Physics · Topic hub
Work, Energy & Power
G3 Physics and O-Level Physics Work, Energy & Power hub: learn work done, kinetic and potential energy, conservation of energy, power, efficiency, and energy resources.
Before you begin
Follow the lesson route in order when the topic is new. If you are revising, begin with the topic check and return to the lesson it identifies.
How the ideas connect
- Work done
- Energy stores and transfers
- Conservation and efficiency
- Power
Learn in order
Lesson route
Syllabus lessons
- 01Energy stores and transfersStores, four transfer pathways and conservation of energy.
- 02KE, GPE and conservation calculationsApply ½mv², mgΔh and energy accounting to unfamiliar situations.
- 03Work doneCalculate W = Fd and identify when a force transfers no energy.
- 04Power and efficiencyCalculate rates of energy transfer and useful output ratios.
- 05Energy resourcesCompare resources using efficiency, cost, reliability and environmental impact.
Practice and application
- 06Work, Energy and Power QuizCheck definitions, formula choice and common misconceptions.
- 07Structured practiceApply energy accounting and comparison skills in longer questions.
- 08Work, Energy & Efficiency ExplorerChoose equations and trace useful and dissipated energy in interactive exam-style scenarios.
- 09Household electricity applicationApply power and energy ideas to appliance ratings and energy use.
Prove your understanding
Practice and repair
Key ideas and reference
Use this concise Work, Energy & Power checklist for orientation. Open a linked lesson for definitions, derivations, diagrams and worked examples.
- Stores, four transfer pathways and conservation of energy.
- Check definitions, formula choice and common misconceptions.
- Apply power and energy ideas to appliance ratings and energy use.
Course coverage and review details
This hub groups the reviewed O Level Work, Energy & Power Hub lesson route.
G3 Pure Physics and retained O-Level access share this learner route while qualification-specific evidence remains separate.
Reviewed Jul 19, 2026
Frequently asked questions
Who is this work-energy-power hub for?
This hub is for O Level students learning energy stores and transfers, conservation, work, power, efficiency and energy resources.
What should I revise first before this topic?
Revise force and kinematics first so work done and kinetic-energy questions can be solved without unit or setup errors.
What mistakes usually cost marks here?
Frequent losses include confusing power with energy, treating energy as used up, mishandling the square-speed relationship in kinetic energy, and swapping useful output with total input in efficiency calculations.
What should I do after this hub?
Do direct work-energy-power practice, then continue to pressure and thermal topics to apply these ideas in fluid and heat contexts.