Think of it this way:

* Position: Where something is located.

* Change in position: How much the location changes.

* Time: How long it takes for the change in position to occur.

Speed is calculated by dividing the distance traveled by the time taken.

For example:

* If you travel 100 meters in 10 seconds, your speed is 10 meters per second.

* If you drive 100 kilometers in 2 hours, your speed is 50 kilometers per hour.