Weight is a measure of the size of an object subjected to gravity. Weight and mass are different, and the unit is Newton. This is the basic property of an object. Under the gravity of the earth, the weight of a substance with a mass of 1 kg is 9.8 Newton.

Because of gravity, an object has a downward force, which is called gravity, also called weight. Due to the gravity of the earth, the latitude and height on the earth are different, and the weight of objects is slightly different. The poles are larger than the equator, and the heights are smaller than the lows. In the same area, the attraction is the same and the weight of the object is the same. [ 1]

Weight is a measure of the force of an object under the action of gravity. Weight and quality are different. The unit is kilogram weight. Under the gravity of the earth, weight and mass are equivalent, but the units of measurement are different. A substance with a mass of 1 kg is called 1 kg when it is subjected to an external force of1Newton. As a physical concept, what is the exact meaning of weight? Different opinions exist in the teaching materials, which leads to confusion in the usage of "polysemy". Under the gravity of the earth, a substance with a mass of 1 kg produces a weight of 9.8 Newton.

Note: Weight only indicates the magnitude of gravity, not the direction of gravity.