Energy Transfer & Work Done (AQA GCSE Physics): Flashcards
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Practise the cards
15 cards from this deck
What are the 4 ways energy can be transferred?
What are the 4 ways energy can be transferred?
Mechanical work, heating, electrical work, radiation
What is mechanical work?
What is mechanical work?
When a force moves an object over a distance
What is heating (energy transfer)?
What is heating (energy transfer)?
Energy transferred from hotter object to colder object
What is electrical work?
What is electrical work?
Energy transferred by moving charge due to potential difference
What is radiation (energy transfer)?
What is radiation (energy transfer)?
Energy transferred as electromagnetic wave (e.g., gamma-rays, UV)
State the Law of Conservation of Energy
State the Law of Conservation of Energy
Energy cannot be created or destroyed; it can only be transferred, stored, or dissipated
What is a closed system?
What is a closed system?
A system where no energy can enter or leave
Pendulum energy at highest points
Pendulum energy at highest points
Maximum GPE
Pendulum energy at lowest point
Pendulum energy at lowest point
Maximum KE
Effect of friction in pendulum
Effect of friction in pendulum
Transfers energy to thermal; pendulum eventually stops
Bungee jumper energy at start
Bungee jumper energy at start
All energy is GPE
Bungee energy when rope fully extended
Bungee energy when rope fully extended
KE is zero; all energy is EPE
Work done formula
Work done formula
(J = N × m)
Energy transfer when car brakes
Energy transfer when car brakes
KE to thermal energy in brakes
Work done: N force, m distance
Work done: N force, m distance
J or kJ