What are Physical quantities ?

All measure able quantities are known as physical quantities, such as length 🦯, time 🕒, mass, temperature 🌡️ etc.

Each physical quantity has at least two characteristics:

• Numerical Magnitude
• Unit of measurement

For Example: A student measure the height of another student 150 cm. In this measurement "150" is numerical Magnitude while "cm" is unit of measurement.

                                                                                  

Physical quantities are divided into two streams:

1. Base Quantities
2. Derived Quantities

Base quantities

                             The quantities on the basis of which other Quantities are expressed are known as base quantities, these includes length, time, mass, electric current, intensity of light, temperature and amount of substance.

Derived quantities 

                                    The quantities that are expressed on the basis of base quantities are known as derived quantities, such as velocity, acceleration, force, momentum and energy etc.