What is mass often related to when discussing physical objects?

Mass is fundamentally related to weight because weight is the force that gravity exerts on an object due to its mass. Essentially, weight is calculated by multiplying an object's mass by the acceleration due to gravity (W = m × g). This means that an object with greater mass has a greater weight when subjected to gravitational pull.

While gravity does play a role in determining weight, it is the relationship between mass and weight that is particularly significant in this context. Density, on the other hand, describes how much mass is contained in a given volume and is a different concept altogether, while volume pertains to the space an object occupies, which also differs from mass. Thus, the most direct and relevant relationship when discussing mass is with weight.