Energy
Energy stores, transfers, work, power and conservation at G2 Science depth.
Learning goals
- Recognise kinetic, potential, nuclear and internal energy stores
- Describe mechanical energy transfer by a force acting over a distance
- Describe electrical energy transfer by an electric current
- Describe energy transfer by heating due to a temperature difference
- Describe energy transfer by electromagnetic and mechanical waves
- Recall and apply Ek = ½mv² in new situations
- Recall and apply Ep = mgh near the Earth's surface in new situations
- State and apply the principle of conservation of energy
- Recall and apply work done = force × distance moved in the force direction
- Recall and apply power = energy transfer / time taken
G2 Science (Physics) · Topic 5
Read the complete lesson from top to bottom first. Pause for its examples and independent questions, then use a short topic check to decide what to practise again.
Before you begin
Build the idea in order
- Energy stores
- Transfer pathways and conservation
- Kinetic and gravitational energy
- Work and power
Lessons
Energy
Energy stores and transfer pathways, conservation, kinetic and gravitational energy, work and power.
Check your understanding
Energy topic check
Check the required topic capabilities and get focused practice for ideas that need another look.
What to remember
- Name stores separately from transfer pathways.
- Energy is transferred rather than used up.
- Use Ek = ½mv² and Ep = mgh in SI units.
- Work is force times distance in the force direction.
- Power is the rate of energy transfer.
Topic and syllabus information
Energy is Topic 5 in K223 / K224 Physics component · 2027.
The lesson stays within G2 depth and includes the explanations, examples and practice needed for this topic.
Reviewed 9 Aug 2026
Continue with the next resource in this course.
Course and syllabus information
- Course
- SEC G2 Science Physics component
- Edition
- SEC G2 Science Physics component 2027