Mass is different from weight (force) in that its value does not change if gravity changes. For example, on Earth, where the acceleration due to gravity is 9.8 m/s2, a person who has 60 kg of mass weighs 588 Newtons (132 lbs). Whereas on the moon, where the acceleration due to gravity is about 1/6 of what it is on Earth, that same 60 kg person weighs just 98 Newtons (~22 lbs).
To read more about the SI unit of mass, the kilogram, click here.
- Wikimedia Commons. (September 2, 2017). [Online], Available: https://commons.wikimedia.org/wiki/File:National_prototype_kilogram_K20_replica.jpg
- Sears, Zemansky, and Young, Fifth Edition University Physics. Addison-Wesley Publishing Company, 1979.