The distance an object moves in a unit of time is called speed.

Here's a breakdown:

* Distance: How far an object travels.

* Time: The duration of the travel.

* Speed: The rate at which an object changes its position over time.

Formula:

Speed = Distance / Time

Example:

If a car travels 100 miles in 2 hours, its speed is:

Speed = 100 miles / 2 hours = 50 miles per hour