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Foundations of Physics

Derived Units

Units of measurement formed as algebraic combinations of the seven fundamental SI base units.

SI unit Various

In depth

Derived units express physical quantities such as area (m²), force (Newton, kg·m/s²), pressure (Pascal, N/m²), and electrical potential (Volt, W/A). Many derived units are given special names to honor prominent physicists.

Examples in the real world

The Watt (W = J/s = kg·m²/s³) for power, and the Ohm (Ω = V/A) for electrical resistance.