* Fundamental Units: These are the basic building blocks of measurement. They are independent and not defined in terms of other units. Examples include:

* Length (meter, m)

* Time (second, s)

* Mass (kilogram, kg)

* Derived Units: These are units that are defined by combining fundamental units. Speed is derived from the fundamental units of length and time.

The Formula:

Speed = Distance / Time

* Distance: Measured in units of length (e.g., meters)

* Time: Measured in units of time (e.g., seconds)

Therefore, the unit of speed is meters per second (m/s).