Equations Flashcards
1
Q
work done
A
work done = force x distance
2
Q
kinetic energy
A
kinetic energy = 1/2 x mass x velocity ^2
3
Q
elastic potential energy
A
1/2 x spring constant x extension^2
4
Q
what is efficiency
A
efficiency = useful energy / input energy
5
Q
power
A
energy / time
6
Q
gravitational potential energy
A
mass x gravitational field strength x height
7
Q
what is the extension measured in
A
metres
8
Q
specific heat capacity
A
energy = mass x change in temperature x specific heat capacity
9
Q
payback time (years)
A
cost to install/ savings each year
10
Q
charge equation
A
current x time
11
Q
what is charge measured in
A
C
12
Q
what is current measured in
A
A
13
Q
what is time measured in
A
seconds
14
Q
voltage/ pd
A
voltage = work done/ charge
15
Q
what is the ohms law equation
A
potential difference = current x resistance
