Rev. Notes > AS > Physical quantities and units Previous Topic Physical quantities and units Next Topic Topics
 Physics Areas of Physics Interdisciplanary areas of physics Quantities in Physics Base Units Convention for indicating units Derived Units S.I. Units (International System of Units) Supplementary units Homogeneity of equations Significant figures Rules of Significant figures Further discussion on Significant figures Dimensions Scientific notation The Avogadro's Constant Scalars and Vectors Addition and subtraction of co-planar vectors Rectangular components of a vector

Derived Units

SI units for measuring all other physical quantities are derived from the base and supplementary units. Some of the derived units are given in Table.

 Derived units Physical quantity Unit Symbol In terms of base units Force Newton N kg m s ˉ² Work joule J m = kg m² sˉ² Power watt W J sˉ¹  = kg m² sˉ³ Pressure Pascal Pa N mˉ²  = kg mˉ sˉ² Electric Charge coulomb C A s

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