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Formulae and units (2)
MOMENT Force x Distance from the pivot Nm
LAW OF MOMENTS F1d1 = F2d2 -
MOMENTUM Change in speed/Time m/s2
POTENTIAL ENERGY Mass x gravity x Height mgh
POWER Work done/Time
Energy changed/Time
PRESSURE Force/Area Pa
RESISTANCE Voltage/Current
SPEED Distance/Time m/s
TRANSFORMER No. of Primary turns/No. of Secondary turns
= Voltage on Primary/Voltage on Secondary
VOLTAGE Current x Resistance V
WORK Force x Distance J
WAVE SPEED Frequency x Wavelength m/s
© Keith Gibbs 2010