Energy Changes in a system and the ways energy is stored before and after these changes Flashcards
What is a potential energy?
Energy that is stored and has the potential to be converted into useful energy e.g. kinetic, light
Gravitational, Chemical and Elastic energy are all form of what type of energy?
Potential energy
Work done?
FORCE X DISTANCE
Gravitational potential energy equation?
mass X gravitational field strength X height.
If an item is dropped what happens to the gpe and kinetic energy?
The GPE decreases as some is converted into kinetic due to the object falling.
Energy cannot be c____ or d______ only _______?
Energy cannot be created or destroyed only transferred.
What is energy measured in?
Joules.
Name the relevant to GCSE types of energy in USE?
Elastic, thermal, light, sound and kinetic.
Name the relevant types of energy stores.
gravitational potential, elastic potential, nuclear potential, and chemical potential.
Kinetic equation?
1/2 x massx velocity”2
What is chemical potential energy?
Energy released via bonds breaking e.g. when some fuel is burnt.
What is nuclear potential energy?
The energy released when a nucleus is split
What is power measured in?
WATTS. (1 watt is equal to 1 joule of energy transferred per second)
Power equation?
energy transferred/ time taken
