Tools, Measurement and SI Units

Tools, Measurements and SI Units

Measurements: Different parts of the world use different units of measurement. Units of measurement are important for of all physical quantity. Just like all objects are addressed by some name, physical quantities are known by the units of measurement. For example a piece of wire length is 3 meters.

1m or 1 meter is considered to be the usual standard of measuring. So , the wire of length is 3m more than the standard unit.

Here we understand that meter is the standard of measurement and the number 3 is the how lengthy the wire is.

Systems of Units of Measurement

There are a set of fundamental units followed in various regions of the world even though fundamental units by default are independent of factors.

Here are some fundamental systems of measurements:

1. FPS (foot, pound, second) system:this system is used generally in Great Britain and the countries it colonized. Here length is foot, mass is pound, time in seconds.
2. The CGS (centimeter, gram, second) system: In the CGS length is measured in centimeters, the mass of any item is measured in grams and time in seconds
3. MKS (meter, kilogram, second) system:  Here, the length is represented by meter, for mass it is kilogram and for time it is seconds.
4. SI system:  In SI system length is measured in meter, mass in kilogram and time in seco The SI system or the International system of standards is now the universal system of measurement. It is the advanced metric system of measurement.

Check Point                 

Fill in the blanks:

1. Units of ……………………. are important for of all physical quantity.
2. Physical quantity should be ……………………..
3. All measuring units must be accepted ………………………. in all nations.
4. The SI system or the …………………….. ……………… of standards is now the universal system of measurement.
5. A graduated cylinder is used to measure the ………… of liquids

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