Equations for GCSE physics.

Speed (metre per second, m/s)= distance travelled (metre m) / time taken (second, s)

Acceleration = change in speed / time taken

Momentum (kg m/s) = mass (kg) x velocity (m/s)

Change in momentum (kg m/s) = resultant force (newton, N) x time for which it acts (s)

Amount of energy transferred (joule, J) = work done (joule, J)

Weight (newton, N) = mass (kilogram, kg) x gravitational field strength (N/kg)

Change in gravitational potential energy = weight x change in height

Kinetic energy = 1/2 x mass x (speed)2

Resistance(ohms) = voltage(V) / current(amp,A)

Primary voltage / secondary voltage = turns on primary / turns on secondary