Explain with examples that physics is based on physical quantities (including that these consist of a magnitude and a unit.
- Differentiate between physical and non physical quantities with examples
Table of Contents
Physical Quantities:
Physical quantities are those quantities which can be measured.
Example:
Quantities like length, mass, time, temperature volume, density can be measured. As they can be measured therefore termed as physical quantities.
Types of Physical Quantities:
There are two types of physical quantities.
- Base quantities.
- Derived quantities.
Non-Physical Quantities:
Non-physical quantities are those quantities which cannot measured.
Example:
Quantities like taste, feelings, color cannot be measured so they are non-physical quantities.
Measurement of Physical Quantities:
Measurement of physical quantities consists two parts
- Numerical Magnitude / Value (number representing the size of the quantity)
- Unit
Examples:
Height
Height of a person is 1.65 meters.
- 1.65 is numerical value / Magnitude.
- Meter is unit of measurement.
Speed
A car travels at 60 kilometers per hour.
- 60 is numerical value / Magnitude.
- Kilometer is unit of measurement.
Weight
A bag of flour weights 2 kilograms.
- 2 is numerical value / Magnitude.
- Kilograms is unit of measurement.
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