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Speed
= distance travelled / time taken
Acceleration
= change in velocity / time taken
Force
= mass x acceleration
Weight
= mass x gravitational field strength
Moment
= force x perpendicular distance from pivot
Power
= current x voltage
Energy
= power x time
Current in amps
charge in coulombs / time in seconds
Voltage, V
current, I x resistance, R
Wave Speed, v
frequency, f x wavelength, lambda
Efficiency
= useful energy output from the system / total energy input to the system
Work, W
= force, F x distance, D
GPE
= mass, m x gravitational field strength, g x height, h
Power (of a system), P
= work done, W / time taken, t
Density, ρ
= mass, m / volume, V
Pressure, p
= force, F / area, A
Pressure difference, p, in Pa
= height in m x density in kg/m^3 x gravitational field strength in N/kg
Momentum
= mass x velocity