Question

define fundamental units and derived units with example​

Answer 1

Answer:

The units which are independent of each other are known as Fundamental Units. Derived Units are derived from Fundamental Units. For example, meter is a fundamental unit of length and second is a fundamental unit of time. However, meter per second (ms-1) is a derived unit of velocity. There are seven fundamental units as given in

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

Each fundamental unit has been defined as follows:

Kilogram

At present, a kilogram is defined by a cylindrical piece of platinum-iridium kept at the office of International Committee on Weights and Measures in Paris. However, that lump has lost 50 microgram since 1879 and that is why scientists are looking for ways of expressing a kilogram in terms of the fundamental constants of nature, rather than a man-made object. l hope it helps thanks.

Answer 2

Explanation:

fundamental unit :- is that which is independent of any other unit or which can neither be changed nor can be related to any other fundamental unit .

example:- the units of mass, length , time , temperature etc

derived unit:- are those which depend on the fundamental units or which can be expressed in terms of the fundamental units.

example :- volume is expressed in a unit which is (length)³