Energy
KS3 - Energy recap
Energy is the ability to do work.
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Key Words
Energy stores - where energy is stored. 8 energy stores are:
- Thermal
- Kinetic
- Gravitational potential
- Elastic potential
- Chemical
- Magnetic
- Electrostatic
- Nuclear
Energy transfer - energy is moved from one store to another.
Work done - same as energy transfer.
Closed systems - somewhere where energy does not enter or leave.
Conservation of Energy Principle - Energy can be transferred usefully, stored or dissipated but can never be created or destoyed.
Dissipated energy - when energy is transfered not all of the energy moves usefully to a store, instead it becomes wasted.
Joule (J) - What energy is measured in. 1000 J = 1 kJ (kilo-joule).
Also see Energy transfers by heating, Energy Resources
EQUATION Work Done with force
EQUATION Kinetic Energy
EQUATION Gravitational Potential Energy
EQUATION Elastic Potential Energy
EQUATION Power with work done
EQUATION Efficiency
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Potential Kinetic Energy
Bitesize: Changes in energy stores
Bitesize: Work, power and efficiency
Pass my exams: Forms of Energy
Pass my exams: Energy Transfer Diagrams
Pass my exams: Conservation of Energy
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