Christopher T. answered • 04/12/19
Professional Mechanical Engineer with In-Depth Physics Knowledge
Gravitational force is inversely proportional to the distance squared between the center of masses of each object. Therefore, different elevations have different gravitational pulls, meaning that objects weigh less when they're at higher elevations, and weigh more at lower elevations; however, the effect is essentially negligible, as the difference is typically only fraction of a Newton, except at extreme elevations. For example, on the top of Mount Everest has a 0.3% decrease in gravitational attraction compared to sea level, so if you had a weight of 600N at sea level, you'd weigh about 598N at the peak.
