UNIT AND DIMENTIONS

Unit is the chosen standard used for measuring a physical quantity.

Units are of two types : Fundamental Units and Derived Units

There are few important unit systems , CGS system stands for “centimeter-gram-second”, MKS system stands for ” meter-kilogram-second”, and SI unit system.

• In SI units, there are seven fundamental units given as follows :

Derived units : all other units than this table are derived units because they are derived from these fundamental units.

1. Force = CGS unit (Dyne), SI unit (Newton)
2. Work = CSG unit (erg), SI unit (Joule)

Dimensions :

Dimensions are expression of various physical parameters in terms of fundamental units. M = Mass, L = Length, T = Time, K = Temperature etc.