3.3: Work, Energy and Power Flashcards
1
Q
Conservation of energy
A
In a closed system with no external forces the total energy of the system before an event is equal to the total energy of the system after the event.
2
Q
Efficiency
A
The useful output (e.g. power, energy) of a system divided by the total output
3
Q
Gravitational potential energy
A
The energy gained by an object when it is raised by a height in a gravitational field.
4
Q
Kinetic energy
A
The energy an object has due to its motion. It is the amount of energy that would be transferred from that object when it decelerates to rest.
5
Q
Power
A
The work done or energy transferred by a system divided by the time taken for that to be done
6
Q
Work done
A
The energy transferred when a force moves an object over a distance.
