# Gravitation Potential Energy - GCSE P4

Revision material for the basics on Gravitational Potential Energy in the OCR 21st Century Science Physics course.

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• Created by: cg97
• Created on: 27-11-12 14:44
• Gravitational Potential Energy (GPE)
• How is GPE increased?
• If you lift an object up, it's GPE increases as it's raised
• As an object falls, it's GPE decreases
• You increase GPE by doing work
• The increase in the GPE is equal to the work done by the lifting force in order to raise its height
• Gravitation Potential Energy is the energy stored in an object when you riase it to a height against the force of gravity
• Change in GPE (J) = Weight (N) x Verticxal Height Difference (m)
• For example: An object weighing 4,000N is propelled 10 metres into the air. What is it's change in GPE?
• 4,000 x 10 = 40,000 J or   40 kJ
• Falling  objects convert GPE into KE (Kinetic Energy)
• KE Gained = GPE lost
• The further something falls, the quicker it will go
• Falling  objects convert GPE into KE (Kinetic Energy)
• KE Gained = GPE lost
• The further something falls, the quicker it will go