Derived units are measurements that are created by combining base units from the International System of Units (SI). For example, the unit of speed, meters per second (m/s), is derived from the base units of length (meters) and time (seconds). These units help quantify complex physical quantities that cannot be expressed using base units alone. Other examples of derived units include newtons (N) for force, which combines kilograms (kg), meters (m), and seconds (s), and joules (J) for energy, derived from newtons and meters. Derived units provide a standardized way to express various physical phenomena in science and engineering.