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Rate of change of the body position  {\bf r}(t) with respect to a frame of reference, and is a function of time  t:

(1) { \bf u}(t) = \frac{d {\bf r}}{ dt}


SymbolDimensionSI unitsOil metric unitsOil field units

u

L T−1m/sm/s

ft/s


See also


Natural Science / Physics


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