Which of the following is not considered a fundamental quantity?

Weight is not considered a fundamental quantity because it is derived from other fundamental quantities rather than existing as an independent measurement. In the International System of Units (SI), the fundamental quantities include length, mass, and time, which are the foundational measurements from which other physical concepts are derived.

Weight, on the other hand, is the force exerted by gravity on an object and is calculated as the product of an object's mass and the acceleration due to gravity (Weight = Mass × Acceleration due to gravity). Since it depends on both mass and gravitational acceleration, weight is classified as a derived quantity. Understanding this distinction is crucial in physical science, as it helps clarify the relationships between different types of measurements and the laws of physics.