# GCSE Physics AQA (single science) equations Paper 1

## Kinetic Energy

Ek = ½ x m x v2

Ek = kinetic energy (J)

m = mass (kg)

v = velocity (m/s)

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## Elastic Potential Energy

Ee = ½ x k x e²

Ee = elastic potential energy (J)

k = spring constant (N/m)

e = extension (m)

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## Gravitational Potential Energy

Ep = m x g x h

Ep = elastic potential energy (J)

m = mass (kg)

h = height (m)

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## Change in Thermal Energy (specific heat capacity)

ΔE = m x c x Δθ

ΔE = change in thermal energy (J)

m = mass (kg)

c = specific heat capacity (J/Kg ℃)

Δθ = change in temperature (℃ )

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P = E / t

P = power (W)

E = energy (J)

t = time (s)

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## Efficiency

Efficiency = useful output energy transfer / total input energy transfer

Efficiency = useful power output / total power input

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## Charge Flow

Q = I x t

Q = charge flow (C)

I = current (A)

t = time (s)

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## Potential Difference

V = I x R

V = potential differnce (V)

I = current (A)

R = resistance (Ω)

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## Power (work done)

P = W / t

P = power (W)

W = work done (J)

t = time (s)

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## Power Content

P = V x I

P = power (W)

V = potential difference (V)

I = current (A)

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## Power Content pt2

P = R x I²

P = power (W)

R = resistance (Ω)

I = current (A)

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## Energy Transfer

E = P x t

E = energy transferred (J)

P = power (W)

t = time (s)

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## Energy Transfer pt2

E = Q x V

E = energy transferred (J)

Q = charge flow (C)

V = potential difference (V)

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## Density

ρ = m / v

ρ = density (kg/m³)

m = mass (kg)

v = volume (m³)

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## Specific Latent Heat

E = m x L

E = energy for a change of state (J)

m = mass (kg)

L = specific latent heat (J/kg)

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## Pressure in Gases

p x V = constant

p = pressure (Pa)

V = volume (m³)

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