Physics Equations AQA GCSE 2022 ONLY Flashcards
What are the units for:
Kinetic energy = 1/2 x mass x speed^2
Ek = 1/2 x m x v^2
Kinetic energy = J
Mass = Kg
Speed = m/s
What are the units for:
GPE = mass x gravitational field strength x height Ep = m x g x h
GPE = J
Mass = Kg
Gravitational field strength = N/kg
Height = m
What are the units for:
Elastic potential energy = 1/2 x spring constant x extension^2
Ee = 1/2 x k x e^2
Ee = J
Spring constant = (N/m)
Extension = m
What are the units for:
Power = work done / time P = W/t
Power = W (watts)
Work done = J
Time = s
What are the units for:
Power = energy transferred / time P = E/t
Power = W (watts)
Energy transferred = J
Time = s
What are the units for:
Efficiency = useful energy output / total energy input Efficiency = useful power output / total power output
Efficiency = % Power = W Energy = J
What are the units for:
Change in thermal energy = mass x specific heat capacity x temperature change
🔺E = m x c x 🔺Ø
Change in thermal energy = J
Mass = Kg
Specific Heat Capacity = J/Kg°C
Temp change = °C
What are the units for:
Charge flow = current x time
Q = I x t
Charge flow = C (coulomb)
Current = A (amps)
Time = s
What are the units for:
Potential difference = current x resistance
V = I x R
Potential difference = V (volts)
Current = A (amps)
Resistance = Ω Ohms
Total resistance equation + units?
Series
Total resistance = resistance of component 1 + resistance of component 2
RT = R1 + R2
Resistance = Ω Ohms
Total resistance equation + units?
Parallel
1/Rt = 1/R1 + 1/R2 + 1/R3
Resistance = Ω Ohms
What are the units for:
Power = current x potential difference
P =I x V
Power = W
Current = A (amps)
Potential difference = V
What are the units for:
Power = current^2 x resistance P = I^2 x R
Power = W Current = A Resistance = Ω Ohms
What are the units for:
Energy transferred = power x time
E = P x t
Energy = J Power = W Time = s
What are the units for:
Energy transferred = charge flow x potential difference
E = Q x V
Energy transferred = J
Charge flow = A
Potential difference = V
What are the units for:
Density = mass / volume P = m / v
Density = g/cm^3 Mass = g Volume = cm^3
OR
Density = kg/m^3 Mass = kg Volume = m^3
What are the units for:
Change in thermal energy = mass x specific heat capacity x temperature change
🔺E = m x c x 🔺Ø
Change in thermal energy = J
Mass = Kg
Specific Heat Capacity = J/Kg°C
Temp change = °C
What are the units for:
Thermal energy for a change in state = mass x specific latent heat
E = m x L
Thermal energy for state change = J
Mass = kg
Specific latent heat = J / kg
Boyles law + units
P1 x V1 = P2 x V2
Pressure = Pa (pascal) Volume = cm^3 OR m^3
What are the units for:
For a gas = pressure x volume = constant
Pressure = Pa (pascal) Volume = cm^3 OR m^3
What are the units for:
Wave speed = frequency / wavelength
v = f x
Wave speed = m/s
Wavelength = m
Frequency = Hz
What are the units for:
Time period = 1 / frequency
T = 1/f
Time period = s
Frequency = Hz
Be aware of this equation:
Magnification = image height / object image M = h-image/ h-object
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What are the units for:
Weight = mass x gravitational field strength
Weight = N
Mass = kg
Gravitational field strength = N/kg
What are the units for:
Work done = force x distance
W = F x s
Work = J Force = N Distance = m
What are the units for:
Hookes Law
Force = spring Constance x extension
F = k x e
Force = N
Spring constant = N/m
Extension = m
What are the units for:
Moment of a force = force x distant
M = F x d
Perpendicular to the direction of teh force
Moment of a force = Nm
Distance = m
Force = N
What are the units for:
Pressure = force normal to a surface / area of that surface P = F / A
Pressure = N/m^2 Force = N Area = m^2
What are the units for:
Distance traveled = speed x time
Distance = m Speed = m/s Time = s
What are the units for:
Acceleration = change in velocity / time taken a = 🔺v / t
Acceleration = final - initial velocity / time taken a = v - u / t
Acceleration = m/s^2 Velocity = m/s Time = s
What are the units for:
Resultant force = mass x acceleration
F = m x a
Resultant force = N
Mass = kg
Acceleration = m/s^2
What are the units for:
Momentum = mass x velocity P = m x v
Momentum = kg m/s Mass = kg Velocity = m/s
What are the units for:
Pressure = height of column x density of liquid x gravitational field strength p = h x p x g
Pressure = Pa Height = m Density = kg/m^3 GFS = N/kg
What are the units for:
Final velocity^2 - initial velocity ^2 = 2 x acceleration x distance
V^2-u^2 = 2 x a x s
Velocity = m/s Acceleration = m/s^2 Distance = m
What are the units for:
Force =Change in momentum / time taken
F = m🔺v / t
Force = N Momentum = kg m/s Time = s
