Requirement of Measurement Physics Notes

Requirement of Measurement:
For the description of any natural phenomenon, measurement of the involved quantities is important. We realise the need of measurement, in every physical situation.

For example, when an apple falls from a tree it falls freely on the surface of the earth. In this situation, one may want to know with what velocity the apple reaches the ground, in how much time does it reach the ground etc. To know these, one must know how to measure distance and time.

Electric bulb is commonly used. It glows by consuming electric energy. The measurement of energy consumed is very important.

When we feel unwell, we measure the temperature from a thermometer. Blood pressure, heart beat etc. are also measured primarily.