energy stores and systems

Cards (14)

what is energy
the capacity of doing work
what are the 4 ways energy can be transferred
mechanically - by a force doing work
electrically - work done by moving charges
by heating
by radiation - e.g. light or sound
name all of the energy stores
Thermal, kinetic, gravitational potential, elastic potential, chemical, magnetic, electrostatic, nuclear
what is internal ( thermal ) energy
the total kinetic and potential energy of the particles of the object
the hotter the object ...
the more internal energy they have and the faster the particles vibrate
what is kinetic energy
the energy of a moving object
what is electrostatic energy
energy stored when repelling charges move closer together or attracting charges move further apart
what is elastic potential energy
energy stored when an object is stretched or squashed
give an example of elastic potential energy
-inflated balloon
-compressed spring
what is nuclear energy
energy stored in the nucleus of an atom
what is a system 
An object or group of objects
what is a closed system
a system where neither matter nor energy can enter or leave
what is work done
energy transferred
Work done formula
work done = force x distance moved
W = F x d