Fundamental and derived quantities examples

Fundamental quantities are the basic quantities that are independent of others and cannot be defined in terms of others quantities or derived from them.

They are the basic quantities upon which most (though not all) quantities depend.

Fundamental units are the basic units upon which other units depend. They are the units of the fundamental quantities.

The three most important basic fundamental quantities in physics are length, mass, time.

Length: may be defined as the extent of space or distance extended.

Mass: is commonly defined as the quantity of matter or material substance.

Time: is defined as that in which events are distinguishable with reference to before or after.

Examples of Fundamental quantities and their units:

Length = metre  (m)

Time    = second  (s)

Mass    = kilogram (kg)

Electric Current = ampere (A)

Temperature = Kelvin  (K)

Amount of Substance  = mole  (mol.)

Luminous intensity = candela (cd)

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