GRAVITATIONAL POTENTIAL ENERGY STORE — The Energy of Height
Part of Energy Stores & Systems — GCSE Physics
This key facts covers GRAVITATIONAL POTENTIAL ENERGY STORE — The Energy of Height within Energy Stores & Systems for GCSE Physics. Revise Energy Stores & Systems in Energy for GCSE Physics with 14 exam-style questions and 30 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 5 of 20 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 5 of 20
Practice
14 questions
Recall
30 flashcards
🏔️ GRAVITATIONAL POTENTIAL ENERGY STORE — The Energy of Height
What it is: Energy stored in any object due to its position in a gravitational field — essentially, how high it is above a reference point (usually the ground).
The physics behind it: Gravity constantly pulls objects downward. When you lift something, you do work AGAINST this pull. That work doesn't disappear — it's stored as GPE. The object now has the "potential" to fall and release that energy. The higher you lift it, the more work you do, the more GPE it stores.
Key relationships:
- Double the height → Double the GPE (directly proportional)
- Double the mass → Double the GPE (directly proportional)
- GPE depends on g (gravitational field strength) — different on Moon vs Earth!
Real-world examples:
- Water behind a dam — billions of tonnes of water, enormous GPE; powers hydroelectric stations
- A roller coaster at the top of a hill — maximum GPE, which converts to KE as it descends
- A skydiver in a plane — has GPE that converts to KE during freefall
- Your body after climbing stairs — you've increased your GPE; feel tired because you did work!
- A raised hammer — GPE converts to KE as it falls, then to work done on the nail
💡 Exam tip: Height must be measured VERTICALLY. If something moves along a slope, only the vertical height change matters for GPE — not the distance along the slope!