* Meters per second (m/s): This is the standard unit in the International System of Units (SI).
* Kilometers per hour (km/h): Commonly used for road vehicles and other land-based transportation.
* Miles per hour (mph): Used in the United States and some other countries.
* Feet per second (ft/s): Sometimes used in engineering and other technical fields.
* Knots (kn): Used for nautical speeds, representing one nautical mile per hour.
The specific unit used for speed depends on the context and what is being measured.
