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.
Change in momentum (kg m/s) = resultant force (newton, N) x time for which it acts (s)
Amount of energy transferred.
Amount of energy transferred (joule, J) = work done (joule, J)
Weight (newton, N) = mass (kilogram, kg) x gravitational field strength (N/kg)
Gravitational potential energy.
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