•The quantity which can be measured directly or indirectly and by mean of which we can describe the law of physics are called physical quantities
E.g. length,mass,volume etc. Physical quantity are of two types
(I) Fundamental quantities
The quantities which do not depend upon other quantities for their complete definition are known as fundamental or base quantities.
There are seven fundamental quantities.
Those are length,mass,time,electric current, thermodynamics temperature ,luminous intensity,amount of substance.
(ii) Derived quantities
the quantities which can be expressed in terms of the fundamental quantities are called derived quantities.
E.g., speed, volume, acceleration ,force ,etc
•Note other than fundamental and derived quantities there are two more quantity is called as supplementary quantities.
E.g., plant angle and solid angle
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