 # What is Physical Quantity Physics Quantity is an occurrence measurable by an instrument.

You can configure the event.

A physical quantity is a blend of a unit and a numeric unit.

A physical quantity features two common factors, one in the numerical unit and the other in the measuring unit.

Physical Quantity can be classified into two categories,

1. Fundamental Quantity

2. Derived Quantity

### What is Fundamental Physical Quantity?

Fundamental Physical Quantity is a free quantity in Physics and cannot be expressed in any other form of the physical quantity.

Fundamental Quantity is known to be the pillar of physical quantities.

The basic quantities like length, mass, time, current, temperature are the primary examples of fundamental quantities.

The primary 7 Fundamental units are as followed,

1. Length – Metre

2. Time – Second

3. Mass – KG (Kilo Gram)

4. Temperature – Kelvin

5. Current – Ampere

6. Luminous Intensity – Candela

7. A Substance Amount – Mole

### What is Derived Quantity in Physics?

The quantities in Physics except fundamental quantities are known as derived quantities.

Derived Quantities in Physics are the quantities expressed through fundamental or derived quantities.

Mathematical symbols of division and multiplication express the derived quantity.

The derived quantities are categorized into two groups. The first group has the derived qualities with units.

On the other hand, the second group consists of the derived qualities that do not have any derived-based unit system.

A few examples of Derived Quantity units are like

1. Volume

2. Velocity

3. Force

4. Density

5. Acceleration

Besides these two, other kinds of quantities are,

1. Scalar Quantity

2. Vector Quantity

### What is Scalar Quantity in Physics?

Scalar Quantity has magnitude, but the quantity has no direction.

The scalar physical quantities are symbolized through English, Latin, or Greek letters.

The print of the scalar symbol is always in italics.

What is Vector Quantity in Physics?

Vector is a physical quantity that consists of direction and magnitude.

The symbols of the vector qualities are printed in bold type with an arrow above or as underlined.

If ‘a’ is the speed of an article, the notation of Vector quantity will be like, u or u.

Both Scalar and Vector are known to be the simplest of physical quantities.

### Why physical quality is a Measure of Inertia?

Inertia is the property of a body. If it moves, the magnitude and direction of the velocity change along. Inertia is a passive property.

The only function of inertia is to oppose the active units like force.

Any physical quantity that expresses the inertia of a body is the mass.

With the mass of an object, the 0%inertia will be high.

A moving object moves not forced by inertia, instead due to the absence of a force that cannot slow down the body.