unit and physical quantities & measurement fundamental and derived quantities

1. A. ANTONY SANTHAN RAJ

2.  A physical quantity is a quantity that can be
measurements and expressed in numbers
and units
 Measurement are expressed in units oficially
accepted unit are called standard unit

3.  The quantities which cannot be expressed in
terms of any other physical quantity is called
fundamental quantity.
 Example:
Length
Mass
Time

4. QUANTITY UNIT SYMBOL
LENGTH METRE m
MASS KILOGRAM Kg
TIME SECOND S
ELECTRIC CURRENT AMPER A

5.  Quantities that can be expressed in terms of
fundamental quantities is called derived
quantity.
 Example:
Area
Volume
Density

6.  All other physical quantities can be derived
from these seven fundamental quantities
 These are called derives quantities

7. QUANTITY UNIT SYMBOL
Area of the square Metre²
or
Square metre
m²
Volume of the cube Metre³
or
Cubic metre
m³
Density Kilogram Metre³ Kgm³
Force Newton N