In weight and balance theory, what is the term for the distance from the fulcrum to an object?

The term that accurately describes the distance from the fulcrum to an object in weight and balance theory is the lever arm. The lever arm is crucial in determining how forces influence the rotation about the fulcrum, as it represents the effective radius at which the force is applied. By understanding the length of the lever arm, one can analyze the torque created by a weight at a specific distance from the point of balance, which is essential for ensuring the aircraft's stability and performance. This principle is foundational for pilots and engineers in maintaining proper weight and balance configurations. Although "moment arm" is often used interchangeably in various contexts, it specifically pertains to the torque calculation rather than the simple distance measurement, distinguishing it from the lever arm concept.