Velocity is the speed with a direction. It is also described as the change in position over the change in time. **Velocity** is the rate at which displacement changes with time. Here is **how to Calculate Velocity**.

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## How to Find the Simple Velocity

- Write down
**the Velocity Formula**. **Plug the values**into the formula.**Example:**John walks from his home to school in 6 minutes and 40 seconds, what is his velocity?**Displacement**= 200 m And**Time**= 6 minutes and 40 seconds = 400 s**Velocity**= North-West =**0.50 m/s**North-west

## How to Find Average Velocity

- Write the formula for
**Average Velocity.** - Find
**the distance between the start and end points.** **Subtract the start time from the end time**to find out the change in time.- To find out the average velocity,
**divide the total displacement by the total time.**

**Example: **A car traveling due east starts at position x = 0 meters. After 8 seconds, the car is at position x = 72 meters. What was the car’s displacement?

## How to Find Average Velocity when Acceleration is Constant

- Write the formula for
**Average Velocity if acceleration is constant**. **Plug the values**into the formula.**For Example**, A bus is traveling forward at a constant velocity of 30 m/s and then begins accelerating at a constant rate. A short time later, the velocity of the truck is 60 m/s, forward. What was the average velocity of the truck during its acceleration?

## How to Find Velocity from Acceleration

- Write the
**formula of Velocity**for an accelerating object. To use this formula you will need the acceleration, and the velocity at any one point in time. **Multiply the acceleration and change in time**.**Add the initial Velocity**and specify the direction of movement.**For Example,**A train going north at 7 m/s accelerates north at a rate of 7 m/s^{2}. How much did the train’s velocity increase in the next 5 seconds?

Accleration a = 70 m/s^{2, }, Change in Time t = 5 seconds

(a * t) = (7 m/s^{2}* 5 s) = 35 m/s increase in velocity.

Initial Velocity, =**7 m/s**

Final Velocity,

## How to Find Circular Velocity

The circular velocity of an object is calculated by dividing the circumference of the circular path by the time period over which the object travels.

- Write down the formula for Circular Velocity.
**Multiply the circular radius by 2π**and**divide this by the time period**.

For Example, Determine the circular velocity of the earth if the distance from Sun to Earth is and the period of earth revolution is 365 days.