A natural object that can be measured is called a physical quantity. in other words, measurable things are called physical quantities.
Example: Length, mass, time, velocity, acceleration, movement, weight, etc. are examples of physical quantities.
- Physical objects and physical quantities are not same. Iron, gold, water, wood are physical objects not physical quantity Because these cannot be measured.
- Their weight, length, mass, volume etc are measured. That is why physical objects are not physical quantities.
Types of physical quantity
There are two types of physical quantities which are –
- Scalar quantity
- Vector quantity
What is scalar quantity?
A physical quantity that has only a magnitude but no direction is called a scalar quantity. in other words, quantities that can only be expressed by magnitude are called scalar quantities.
All these quantity’s are expressed by magnitude only. No direction is required.
What is Vector quantity
A physical quantity that has both magnitude and direction is called a vector quantity. in other words, quantities are expressed by values and directions. These quantities are called vector quantities.
Examples of Vector Quantities
- Angular velocity
- Linear momentum