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Distinguish between fundamental units and derived units.

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Fundamental units Derived units

Fundamental units are all those units which are independent of any other unit.

Derived units are all those units which are obtained by multiplying and/or dividing one or more fundamental units.

Fundamental units cannot be expressed in terms of derived units.

Derived units can be expressed in terms of fundamental units.

Only seven fundamental units exist in Metric System or SI system.

There exist a large number of derived units in Metric System.

examples:-

  • Length (Meter, m)
  • Mass (Kilogram, kg)
  • Time (Second, s)
  • Temperature (Kelvin, K)
  • Amount of substance (Mole, mole)
  • Electric current (Ampere, A)
  • Luminous intensity (Candela, cd)

examples:-

  • Velocity (m/s)
  • Acceleration (m2/s)
  • Momentum (kg-m/s)
  • Force (N)
  • Density (kg/m3)
  • Heat (J)
  • Energy (J)
  • Power (W)

 

Posted by

shubham.krishnan

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