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CBSE Class 11-science Answered

give classification of unit with example
Asked by bamanetushar48 | 29 May, 2021, 02:16: PM
Expert Answer
Classification of units :-   (i ) Fundamental units  and (ii) derived units 
 
(i) Fundamental units are  given in table below
 
Quantity Units
Distance Metre  ( m )
Mass kilogram ( kg )
Time  seconds ( s)
Temperature Kelvin ( K )
Current Ampere ( A )
Luminance   Candela ( Ca )
Amount of substance Mole  ( mole) 
 
 
(ii) Derived units are expressed in terms of fundamental units 
 
Quantity Units
Area = Length × Length       m2 
Volume = Length × Length × Length   m3 
Density = mass / volume  kg / m3
speed = distance / time  m / s
acceleration = change in speed / time   m / s2
Force = mass × acceleration   N = kg m /s2
Workdone = force × distance  J = N × m 
Answered by Thiyagarajan K | 29 May, 2021, 04:40: PM

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