Step 1: Understand what a fundamental unit is. Fundamental units are the basic units of measurement in a system, like meters for length, kilograms for mass, and seconds for time.
Step 2: Know what a derived unit is. Derived units are created by combining fundamental units. For example, a joule is a derived unit because it is defined as a kilogram meter squared per second squared (kg·m²/s²).
Step 3: Identify the options given in the question. Look for the unit that is not a fundamental unit.
Step 4: Recognize that joule is not a fundamental unit because it is derived from other units.
Step 5: Conclude that the answer to the question is that joule is not a fundamental unit.
