# What is Velocity? What is The Definition of Velocity?

Here’s how to calculate the velocity of a moving body or particle.

In this article, you will get information about velocity. Like who is called Velocity? What is the definition of velocity? The formula for velocity, the unit of velocity, etc. is explained here.

# What is Velocity :

The distance covered by a moving object in a fixed direction in unit time is called the velocity of the object. In velocity r we know the direction but in speed, we do not know the direction.

## The Definition of Velocity :

Velocity is the rate of relative change in the time of displacement of an object. That is, the distance covered by an object in a unit time interval is called the velocity of the object. Velocity is a vector quantity.

## Formula of Velocity :

• velocity = displacement/time
• SI unit of velocity :
meter/second (m/s)
• Unit of Velocity:
centimeter/second (cm/s)

## Velocity Type :

The different types of velocity are mentioned here.

(1) What is called uniform velocity?
If an object covers the same distance in a certain direction and in equal time intervals, then the velocity of that object is said to be uniform velocity. This is possible only when the object is moving in a straight line and the same direction with a constant velocity and the acceleration is zero.

(2) What is called unequal velocity?
If an object covers the unequal distance in a certain direction in equal intervals of time, then that object is said to have unequal velocity.

3) What is the average velocity?
Average velocity is the ratio of the total distance covered by an object to the total time taken to cover that distance.

(4) What is the instantaneous velocity?
The ratio of the very small displacement and the small-time interval covered by an object in a very small time interval is called the instantaneous velocity of the object.

V = dx/dt

What Is the Difference Between Average Velocity and Average Speed? Average velocity is a vector quantity, while average speed is a scalar variable

For a moving object, the average speed can never be negative or zero whereas average velocity can be negative or zero.

If the moving object comes back to its initial position then the average velocity is zero but the average speed can never be zero, it is either constant or greater than zero.

Average velocity has only one value for a given time interval whereas average speed can have many values ​​depending on the path traveled.

### Difference Between instantaneous Speed and Instantaneous Velocity :

When an object is moving with a constant velocity, the average velocity and the instantaneous velocity of the object are always the same. The instantaneous velocity is always in the tangent direction of the path traveled by the object. It is possible that the instantaneous speed of an object is fixed but the instantaneous velocity changes.

1. What is Velocity?
Ans: The distance covered by a moving object in a fixed direction in unit time is called the velocity of the object.

2. Is velocity a scalar quantity or a vector quantity?
Ans: Velocity is a vector quantity in which we know the direction.

3. What is the formula for velocity?
Ans: Formula of velocity = displacement/time.

4. What is the unit of Si velocity?
Ans: The unit of velocity is meter per second.

5. How many types of velocity are there?
Ans: There are mainly four types of velocity.

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