Editing Weight (section)

===Newton===
The introduction of [[Newton's laws of motion]] and the development of [[Newton's law of universal gravitation]] led to considerable further development of the concept of weight. Weight became fundamentally separate from [[mass]]. Mass was identified as a fundamental property of objects connected to their [[inertia]], while weight became identified with the force of gravity on an object and therefore dependent on the context of the object. In particular, Newton considered weight to be relative to another object causing the gravitational pull, e.g. the weight of the Earth towards the Sun.<ref name="Galili"/>

Newton considered time and space to be absolute. This allowed him to consider concepts as true position and true velocity.{{Clarify| reason = broken sentence; not sure if it should say "*such* concepts as", or if there is something else missing|date=June 2011}} Newton also recognized that weight as measured by the action of weighing was affected by environmental factors such as buoyancy. He considered this a false weight induced by imperfect measurement conditions, for which he introduced the term ''apparent weight'' as compared to the ''true weight'' defined by gravity.<ref name="Galili"/>

Although Newtonian physics made a clear distinction between weight and mass, the term weight continued to be commonly used when people meant mass. This led the 3rd [[General Conference on Weights and Measures]] (CGPM) of 1901 to officially declare "The word ''weight'' denotes a quantity of the same nature as a ''force'': the weight of a body is the product of its mass and the acceleration due to gravity", thus distinguishing it from mass for official usage.