Energy Flashcards
1
Q
kinetic energy
A
kinetic energy = 1/2 mass x speed^2
Ek = 1/2 mv^2
2
Q
elastic potential energy
A
elastic potential energy = 1/2 x spring constant x extension^2
3
Q
gravitational potential energy
A
gravitational potential energy = mass x gravitational field strength x height
Ep = mgh
4
Q
change in thermal energy
A
change in thermal energy = mass x specific heat capacity x temperature change
ΔE = mcΔθ
5
Q
power
A
power = energy transferred / time
P = E / t
6
Q
power
A
power = work done / time
P = W / t
7
Q
efficiency
A
efficiency = useful energy out / total energy in
or
total power out / total power in
