Equations - P1 Flashcards
To study all the equations in the P1 paper
weight (W) =
weight = mass x gravitational field strength
W = m g
force applied to a spring (F) =
Force applied to a spring = spring constant x extension
F = ke
(HIGHER ONLY)
momentum (p) =
momentum = mass x velocity
p = m v
Gravitational Potential Energy (Ep) =
Gravitational Potential Energy = mass x gravitational field strength x height
Ep = m g h
power (Work Done and Time) =
Power = work done / time
P = W / t
efficiency (power) =
efficiency = useful power output / total power output
charge flow (Q) =
charge flow = current x time
Q = I t
power (P) (Voltage and Current) =
power = potential difference x current
P = V I
energy transferred (Power and time) =
energy transferred = power x time
E = P t
density (p) =
density = mass / volume
p = m / v
work done =
work done = force x distance
W = F s
distance travelled =
distance travelled = speed x time
s = v t
kinetic energy =
kinetic energy = 0.5 x mass x velocity2
Ek = 0.5 m v2
power (Energy and time) =
power = energy transferred / time
P = E / t
efficiency (energy transfer) =
efficiency = useful output energy transfer / useful input energy transfer
potential difference =
potential difference = current x resistance
V = I R
power (Current and resistance) =
power = current2 x resistance
P = I2 R
energy transferred (Charge flow and Voltage) =
energy transferred = charge flow x potential difference
E = Q V
What are the units for momentum?
Kilograms metres / second
kg⋅m/s
What are the units for power?
Watts (W)
What are the units for density?
Kilograms / centimetres3
kg / cm3
What are the units for potential difference?
Voltage (V)
What are the units for charge flow?
Coulombs (C)
