Question

define fundamental and derived unit with example​

Answer 1

Answer:

The units which can neither be derived from other units nor they can be further resolved into simpler units are called fundamental units. Examples: Mass, length etc. Those units which can be expressed in terms of the fundamental units are called derived units. Example: speed, velocity, acceleration

Answer 2

A fundamental unit is a unit adapted for the measurement of a base quantity. A base quantity is one of a conventionally chosen subset of physical quantities, where no subset quantity can be expressed in terms of the others.

   Length (meter)

   Mass (kilogram)

   Time (second)

   Electric current (ampere)

   Thermodynamic temperature (kelvin)

   Amount of substance (mole)

   Luminous intensity (candela)

Apart from the above seven, there are two supplementary fundamental units viz. Radian and Steradian. While Radian (Rad) is used to measure the plane angle, Steradian (Sr) is used to measure Solid Angle.

The derived units are derived from fundamental units. Examples of derived units are velocity (meter/second), acceleration (meter /second²) etc.

The units which can neither be derived from other units nor can be further resolved into simpler units are called fundamental units. Examples: Mass, length, etc. Those units which can be expressed in terms of the fundamental units are called derived units. Example: speed, velocity, acceleration e,tc.04-Jun-2014

What are derived units give one example?

The SI has special names for 22 of these derived units (for example, hertz, the SI unit of measurement of frequency), but the rest merely reflect their derivation: for example, the square meter (m2), the SI derived unit of area; and the kilogram per cubic meter (kg/m3 or kg⋅m−3), the SI derived unit of density.

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