Gravitational force does not decrease when it is used to move a mass, as force is not a finite resource that can be 'used up.' While the force does perform work on the mass, this does not imply a reduction in the gravitational force itself. The distinction between force and energy is crucial; force is a vector quantity that causes motion, whereas energy is the capacity to do work. Therefore, gravitational force remains constant regardless of its application in moving a mass. Understanding this difference is essential in physics discussions about force and energy.