iGCSE CIE Physics 0625 Formula List

Force (N)

mass (kg) × acceleration (ms-2)

Average speed (ms-1)

distance (m) / time (s)

Average velocity (ms-1)

displacement (m) / time (s)

Period of a pendulum (s)

total time (s) / number of swings

Acceleration (ms-2)

final velocity (ms -1) - initial velocity (ms -1) / time (s)

Weight (N)

mass (kg) × gravitational field strength (ms-2)

Density (kgm-3)

mass (kg) / volume (m3)

Hooke's law

Force (N) = constant (Nm-1) × extension (m)

Pressure (Pa)

force (N) / area (m2)

Fluid Pressure (Pa)

density (kgm-3) × gravitational field strength (ms-2) × height (m)

Work (J)

force (N) × distance moved (m)

Power (W)

work (J) / time (s)

Kinetic Energy (J)

½ × mass (kg) × velocity² (ms-1)

Gravitational potential energy (J)

mass (kg) × gravitational field strength (ms-2) × height (m)

Efficiency (%)

useful power output (W) / total power input (W) × 100

Moment (Nm)

force (N) × perpendicular distance from pivot (m)

Momentum (kgms-1)

mass (kg) × velocity (ms-1)

Impulse (kgms-1 or Ns)

change in momentum (kgms-1)

Centripetal Force (N)

mass (kg) × velocity² (ms-1) / radius (m)

Orbital Period (s)

2 × π × radius (m) / velocity (ms-1)

Boyle's Law

pressure1 (Pa) × volume1 (m3) = pressure2 (Pa) × volume2 (m3)

Energy (J)

mass (kg) × specific heat capacity (Jkg-1°C-1) × temperature change (°C)

Thermal capacity (J°C-1)

mass (kg) × specific heat capacity (Jkg-1°C-1)

Energy transferred (J)

mass (kg) × specific latent heat (Jkg-1)

Expansion (m)

linear expansivity (°C-1) × original length (m) × temperature rise (°C)

Current (A)

charge (C) / time (s)

Voltage (V)

energy transferred (J) / charge (C)

Resistance (Ω)

resistivity (Ωm) × length (m) / area (m2)

Transformers

voltage in secondary coil (V) = turns on secondary coil / voltage in primary coil (V) / turns on primary coil

Wave speed (ms-1)

frequency (Hz) × wavelength (m)

Refractive index

sine of the angle of incidence (i) / sine of the angle of refraction (r)

Energy (J) in nuclear physics

mass defect (kg) × speed of light² (ms-1)