Speed is the rate at which an object moves. It's a measure of how fast something is traveling.

Here's a more detailed breakdown:

* Speed is a scalar quantity: This means it only has magnitude (amount) and not direction.

* Speed is calculated by dividing the distance traveled by the time taken:

* Speed = Distance / Time

* Units of speed: Common units include meters per second (m/s), kilometers per hour (km/h), and miles per hour (mph).

For example, if a car travels 100 kilometers in 2 hours, its speed is 50 kilometers per hour (100 km / 2 hours = 50 km/h).