Question

What are physical and derived quantity?

Answer 1

::)The quantities which can be expressed in terms of law of physics like time,length,volume and density.. etc arecalled physical quantities.
they can also be measured.
There are two types of physical quanties;
1)Fundemental physical quantity:
*)Are expressed in standard units
*)There are 7 basic physical quantities
*)examples; mass,length,time,electric curent,temperature,luminous intensity and amount of substunce
*)all other quantities are expressed in terms of these quantities.
2)Derived physical quantities:
*)When a physical quantity is expresses itsels in terms of two or more fundemental physical quantities.
*)it is derived by multiplying or deviding one basic physical quantity with another physical quantity
*)examples; Density,Volume,force,power and velocity.