Question

Explain derived quantities and state its two example

Answer 1

derived quantities, are defined in terms of the seven base quantities via a system ofquantity equations. The SI derived units for these derived quantities are obtained from these equations and the seven SI base units.

You see there are 7 fundamental quantities or basic quantities like

Mass

Length

Time

Temperature

Intensity of current

Luminous intensity

Amount of substance

There quantities have SI UNITS (SYSTEM INTERNATIONAL UNITS):

MASS -KILOGRAM - KG

LENGTH -METRE - m

Time - seconds -s

Temperature - kelvin -K

Intensity of current - Amphere-A

LUMINOUS INTENSITY - CANDELA -cd

Amount of substance - mol

From these there some other units are based from them.

For example Area Of square a^2 meaning l*l

Here the formula is a^2 but isn't it from the fundamental unit L

Answer 2

Alright , if you want to understand the concept of derived quantities , we must go step by step .

So first of all :

PHYSICAL QUANTITIES :

“All the measurable quantities are called physical quantities.”

Every physical quantity consists of two things

1. Numerical magnitude

2. Unit

EXAMPLE :

If I buy 5 Kg of sugar then , here mass is the physical quantity being measured , 5 is its numerical magnitude and Kg is the unit .

TYPES OF PHYSICAL QUANTITIES:

There are two types or divisions of physical quantities :

1.Base quantities

2. Derived quantities

1.BASE QUANTITIES:

There are 7 physical quantities which form the foundation for other physical quantities meaning they have no origin and are natural. The definition goes as follows :

“Base quantities are those quantities on the basis of which other quantities are expressed”

EXAMPLES

Now these are seven in number and are fixed .



And these quantities basically combine to form derived quantities .

DERIVED QUANTITIES:

“The physical quantities which are expressed in terms of base quantities are called derived quantities”.

In simple words one or two base quantities are either multiplied or divided to form a new quantity .You can get better understanding through examples .

EXAMPLES:

> Speed :

It is the combination of two base quantities distance (length) and time and is obtained by diving them .

v=d/t

>Volume :

It is obtained by multiplying the base quantity length.

V= length * length * length

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Best of luck :