Physics energy equations and units

word equation for Kinetic energy

kinetic energy = 0.5 x mass x velocity2

word equation for gravitational potential energy

gravitational potential energy = mass x gravitational field strength x height

word equation for power

power = energy transferred / time

word equation for efficiency (energy)

efficiency = useful energy output / total energy input

word equation for efficiency (power)

efficiency = useful power output / total power input

word equation for power

power = work done / time

units for energy

Joules, J

units for mass

kilograms, Kg

units for velocity2

metres per second, m/s

units for gravitational field strength

9.8 Newtons per kilogram / 9.8N/kg

units for efficiency

percentage or decimal

units for work done

joules, J

units for power

watts, W

units for time

seconds, s

units for height

metres, m