Units and Base Quantities
- Physical quantities are quantities that can be measure.
- Physical quantities can be classified into two types,
- the base quantities
- the derived quantities
- Base quantities are quantities that cannot be defined in terms of other base quantities
- Derived quantities are physical quantities derived from a combination of various base quantities through multiplication or division.
- Three basic quantities we measure in physics are length, mass and time.
- Units for other quantities are based on them.
- For example, are of a rectangle = Width x Length. Both width and length are base quantities, whereas area is a derived quantity as it is derived from length.