PHYSICAL QUANTITY

PHYSICAL QUANTITY
DEFINITION
A quantity that can be observed measured and laws of physics can expressed in term of those quantity is called physical quantity
EXAMPLE
Length,height,volume,force,temperature,mass etc

CLASSIFICATION OF PHYSICAL QUANTITIES
There are two types of physical quantities
1) Base physical quantity
1) Derived physical quantity

*)BASE PHYSICAL QUANTITY
DEFINITION
The minimum number of physical quantities in term of which other physical quantities are expressed is known as base physical quantities
EXAMPLE
The seven base physical quantities are
1)Length
2)Mass
3)Time
4)Temperature
5)Electric current
6)Luminous intensity
7)Amount of substance

DERIVED PHYSICAL QUANTITIES
DEFINITION
All those quantities which are derived from base physical quantities are known as derived physical quantities
EXAMPLE
Speed,velocity,force,acceleration,power,work etc

EXPLANATION
Speed is derived physical quantity because speed is obtained from the division of two base quantities i.e length and time