Work And Power Flashcards
1
Q
What is the principle of energy
A
Energy cannot be created or destroyed. Energy can only be transferred from one type to another
2
Q
What is work ?
A
Work is done when energy is transferred from one form to another
3
Q
Equation for work done
A
Work done = force x distance
4
Q
What is Power ?
A
The rate of doing work
5
Q
Equation for power
A
Power = work done/time
6
Q
What is work done measured in ?
A
Joules
7
Q
Equation for kinetic energy
A
1/2 x mass x velocity2
8
Q
Equation for change in GPE
A
Change in GPE = mass x gravitational field strength x change in height
9
Q
When doing a change in GPE question what do you assume ?
A
There was no air resistance so energy was not lossed through air resistance
