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Subject 04 · Mechanics

Chapter 04

Energy

Use energy as a bookkeeping language for change: motion, height, springs, heat, conservation, and the calculus linking force to potential.

MYPIGCSEA-LevelAPIBDepth varies by course
Anchor ideaK = ½mv²
A visual modelMOTION · STORAGE · TRANSFER
5 connected lessonsBuild the ideas in sequence
Interactive concept labChange a value. See the physics.
Energy BudgetLearn through a free physics game
Formulae & exam practiceTurn understanding into confidence
One connected route

Build energy one idea at a time.

Start with the foundations, then explore advanced ideas and calculus at the depth your course needs.

5 of 5 lessons

Interactive concept lab

Change one variable. Watch the physics respond.

Explore K = ½mv², then take the idea into the full lessons.

Concept lab · explore

See how speed changes energy

K = ½mv²
Model output288 J

Kinetic energy grows with speed squared, not speed alone.

Output as mass changesSpeed held at 12 m/s
See how speed changes energy relationship graph0.220Mass (kg)14400Output (J)
Learn · explore · practise

Everything around the chapter, in one place.

Keep building with practice, classroom presentations, formulae, and a game that puts these ideas to work.

Key ideas to remember

Start with kinetic energy, then add gravitational and elastic stores. Conservation and calculus explain how the pieces connect; the final mission combines them.

Continue the sequence

Move without losing your place.

Extra challenging questions

Take the ideas further with course-specific extension questions, supplied-data graphs and worked solutions.