Chapter 8: Work Done And Power Flashcards
1
Q
Energy stores
A
- kinetic energy
- GPE
- EPE
- chemical energy
- thermal energy
- nuclear energy
2
Q
Energy transfers
A
- radiation (sound, light, heating (infra-red) )
- WORK DONE by electric current
- WORK DONE by/against forces (mechanical)
3
Q
Work done is energy lost from…
A
Store
4
Q
Work done (J) =
A
Force (N) x distance moved in direction of force (m)
W = fd
(Or : E = fd)
5
Q
Power (W) =
A
Work done (J) / time (s) P = W/t
6
Q
Work done is …
A
How much energy is transferred
7
Q
Power is …
A
How much energy transferred per second (rate of energy transfer)
