In the language of measurement, 'dimensions?' are measurable attributes of reality such as 'time', 'distance?', 'velocity', 'mass', 'weight', and so on.

A system of Fundamental dimensions is such that every other dimension can be generated from them.

This system is considered by the System of Units made by

7

fundamental ones.

Traditionally, the accepted more used fundamental dimensions are

4

:

1. mass,
2. length,
3. time,
4. and electric current,

but, the other

3

fundamental dimensions can also be used for more complex physics problems:

1. ([thermodynamic temperature]?,
2. [amount of substance]?,
3. [luminous intensity]?).

Velocity, for example, is length divided by time, and so can be generated from the above list of fundamental dimensions.

Physics call velocity a [derived dimension]?.

Please See also: dimensional analysis

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