equations Flashcards
Gravitational potential energy (GPE)
GPE=mass x gravitational field strength x height
E = m g h
Resultant force
given:
mass
acceleration
resultant force = mass X acceleration
F = m a
Force applied to a spring
given:
spring constant
extension
Force=spring constant X extension
F = e k
Distance
given:
speed
time
Distance = speed X time
s = v t
weight
given:
mass
gravitational field strength
weight = mas X gravitational field strength
W = m g
kinetic energy
kinetic energy = 0.5 X mass X (speed)^2
Ek = 0.5 m v^2
acceleration
given:
change in velocity
time taken
acceleration = change in velocity / time taken
work done
given:
force
distance
work done = force X distance
W = F s
power
given:
potential difference
current
power = potential difference X current
P = V I
Wave speed
given:
frequency
wavelength
wave speed = frequency X wavelength
power
given:
energy transferred
time
power = energy transferred / time
P = E / t
energy transferred
given:
charge flow
potential difference
energy transferred = charge flow X potential difference
E = Q V
potential difference
given:
current
resistance
potential difference = current X resistance
V = I R
efficiency
efficiency = useful output energy transfer / total inut energy transfer
efficiency = useful power input / total power input
power
given:
current
resistance
power = (Current)^2 X resistance
