Chapter 2

In order to measure we need to know or define the quantity to be measured and the units for measuring it. In 1971 a system known as the International System of Units (Systeme’ Internationale) and seven basic units were agreed upon as follows. Other quantities can be obtained from these basic quantities and are referred to as derived quantities.

There are three fundamental quantities measured in physics, namely: 

1. Length 

2. Mass

 3. Time  

Measurement

 INTERNATIONAL SYSTEM OF UNITS (S.I UNIT)

 This is a metric system of measurements recommended in physics. S.I unit were derived from the M.K.S system. 

These first 3 basic units are the metre (m), kilogram (kg) and second (s) LENGTH Length is a distance between two fixed points or is a space between two points. S.I unit of length is metres (m) 

Other units