equations Flashcards
1
Q
kinetic energy
A
1/2 x mass x speed²
2
Q
gravitational potential energy
A
mass x gravitational field strength x height
3
Q
power
A
work done ÷ time taken
energy transferred ÷ time taken
4
Q
efficiency
A
useful energy/power output ÷ total energy/power output
5
Q
charge
A
current x time
6
Q
PD
A
current x resistance
7
Q
total resistance
A
resistance of component 1 + resistance of component 2
8
Q
power
A
current x PD
current² x resistance
9
Q
energy transferred
A
power x time
charge x PD
10
Q
density
A
mass ÷ volume
