Units and Measurements
Channel: NCERT OFFICIAL
Date: 2020-10-16

Describing the physical quantities required to describe the physical world that we live in. It helps us to realize the need for measurement and need for a universally accepted unit of measurement. It distinguishes between fundamental and derived units giving details of SDI system of units.
Explains the challenges of measuring length, mass or time values for which would change tremendously in the real world. Describes about the some methods used for measurements.