# 3 difference between fundamental and derived physical quantities

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Fundamental quantities are those which are the most basic quantities in nature and cannot be derived. Example: Length, Mass, Time etc. You cannot derive them from other quantities.

Derived quantities are those which can be derived from the fundamental quantities. Example: Seed is a derived quantity. It can be derived from fundamental quantities length and time.

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The units of fundamental physical quantities are called fundamental units. They are length, mass and time. These units can neither be derived from one another nor can be resolved into any other units. They are independent of one another.

Units of physical quantities can be expressed in terms of fundamental units and such units are called derived units.

Unit of area can be an example for derived unit. If L is the length of square then L x L = L2 is its area. Similarly, the volume of a cube is L x L x L = L3 cubic area. Units of any physical quantity can be derived from its defining equation.  • -2
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