Conservation of energy (Edexcel GCSE Physics Combined Science): Flashcards
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Conservation of Energy principle
Conservation of Energy principle
Energy cannot be created or destroyed
What happens to energy in a system
What happens to energy in a system
Transfers from one store to another
Definition of a system
Definition of a system
A group of things thought of as a whole
Total energy in a system
Total energy in a system
Always stays the same
Definition of a closed system
Definition of a closed system
A system where no energy enters or leaves
Ball thrown upwards - initial energy store
Ball thrown upwards - initial energy store
Kinetic energy store (moving)
Ball rising - energy store gained
Ball rising - energy store gained
Gravitational potential energy store (gaining height)
Mechanical energy transfer
Mechanical energy transfer
Energy transferred when a force moves an object
Electrical energy transfer
Electrical energy transfer
Energy transferred through electric currents
Heating energy transfer
Heating energy transfer
Energy moves from hot to cooler
Radiation energy transfer
Radiation energy transfer
Energy transferred by light or sound waves
Example of mechanical transfer
Example of mechanical transfer
Pushing a car transfers energy to kinetic energy store