The rate at which an object's position changes over time.

Here's a breakdown:

* Rate: This implies a quantity measured over a specific time interval.

* Position: This refers to the location of an object in space.

* Changes: This means the object is moving, and its position is not static.

Mathematically, speed is calculated as:

Speed = Distance / Time

Where:

* Distance: The total length of the path traveled by the object.

* Time: The duration of the movement.

Important Notes:

* Speed is a scalar quantity, meaning it only has magnitude (how fast something is moving). It doesn't consider direction.

* Velocity, on the other hand, is a vector quantity, taking both magnitude and direction into account.

For example, a car traveling at 60 miles per hour has a speed of 60 mph. If we know it's traveling east, we can also say it has a velocity of 60 mph east.