OxNotes > GCSE Physics > GCSE Physics Equations & Formulae - Cheat Sheet

## Formula Cheat Sheet:

**One simple sheet of formulae and equations, for GCSE Physics.**

AQA below. Scroll down further for OCR.

Your browser does not support viewing this document. Click here to download the document.

## OCR GCSE Physics Formula Sheet:

**See the OCR (9-1) Physics Equation list below. You need to learn the following equations:**

Format: 'Equation in word form' '

**E**

**quation in symbol form'**

**P1 Matter**

- Density (kg/m³) = mass (kg)/volume (m³)
**ρ = m/V**

**P2 Forces**

- Distance travelled (m) = speed (m/s) × time(s)
**s = v/t** - Acceleration (m/s²) = change in velocity (m/s)/time(s)
**a = (v-u)/t** - Kinetic energy (J) = 0.5 × mass (kg) × (speed (m/s))²
**KE = ½ mv****²** - Force (N) = mass (kg) × acceleration (m/s²)
**F = ma** - Work done (J) = force (N) × distance (m) (along the line of action of the force)
**WD = F x D** - Power (W) = work done (J)/time(s)
**P = WD / t** - Momentum (kgm/s) = mass (kg) × velocity (m/s)
**p = mv** - Weight = gravity force (N) = mass (kg) × gravitational field strength, g (N/kg)
**F = W = mg** - Potential energy (J) (in a gravity field) = mass (kg) × height (m) × gravitational field strength, g (N/kg)
**GPE = mgh** *Pressure (Pa) = Force (N) / Area (m²) (Separate Science only)**Moment of a force (Nm) = force (N) x distance (m) (normal to the direction of the force) (Separate Science only)*

**P3 Electricity**

- Charge flow (C) = current (A) × time (s)
**Q = It** - Potential difference (V) = current (A) × resistance (Ω)
**V = IR** - Energy transferred (J) = charge (C) × potential difference (V)
**E = QV** - Power (W) = potential difference (V) × current (A) = (current (A))² × resistance (Ω)
**P = IV = I²R** - Energy transferred (J, kWh) = power (W, kW) × time (s, h)
**E = Pt**

**P5 Waves**

- Wave speed (m/s) = frequency (Hz) × wavelength (m)
**v = fλ**

**P7 Energy**

- Efficiency = useful output energy transfer (J)/input energy transfer (J)

**P8 Global Challenges**

- Stopping distance (m) = thinking distance (m) + braking distance (m)

**You will be given the following formulae in the exam (OCR GCSE):****P1 Matter**

- Change in thermal energy (J) = mass (kg) × specific heat capacity (J/kg°C) × change in temperature (°C)
**E = mCΔT** - Thermal energy for a change in state (J) = mass (kg) × specific latent heat (J/kg)
**E = mL** *Gases: Pressure (Pa) x volume (m³) = constant (for a given mass of gas and at a constant temperature) (Separate Science only)**Pressure due to a column of liquid: (Pa) = height of column (m) x density of liquid (kg/m³) x g (N/kg) (Triple only) (Separate Science only)*

**P2 Forces**

- Final velocity (m/s))² – (initial velocity (m/s))² = 2 × acceleration (m/s²) × distance (m)
**v² – u² = 2as** - Energy transferred in stretching (J) = 0.5 × spring constant (N/m) × (extension (m))²
**E = ½ ke²**

**P4 Magnetism**

*Force on a conductor (at right angles to a magnetic field) carrying a current (N) = magnetic field strength (T) × current (A) × length (m) (Higher only)***F = BIl**

*Potential difference across primary coil (V) / potential difference across secondary coil (V) = Number of turns in primary coil / number of turns in secondary coil (Higher only) (Separate Science only)***V****ₚ***/ V*ₛ*= N*ₚ*/ N*ₛ