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Power — Energy Changes and Storage — AQA GCSE Physics 8463
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Physics
AQA GCSE Physics
Energy
Energy Changes and Storage
Power
AQA GCSE Physics · 8463
Power
What you need to know
Define power as the rate at which energy is transferred or the rate at which work is done.
Calculate power using the equations:
P
=
E
t
P = \frac{E}{t}
P
=
t
Revision notes
1
Power
5 key terms
Practise with past papers
Key terms & definitions
Previous subtopic
Energy changes in systems
Next topic: Conservation and Dissipation
Energy transfers in a system
E
P
=
W
t
P = \frac{W}{t}
P
=
t
W
Explain that an energy transfer of 1 joule per second is equal to a power of 1 watt.
Give examples that illustrate the definition of power (e.g. comparing two electric motors lifting the same weight).
