Mass can be defined as the amount of matter in an object. This should not be confused with weight, in fact it represents the measurement of an object's resistance to acceleration in the presence of applied force. The SI unit for mass is kilogram (kg).
- ↑ Engineering Toolbox. Mass and Weight National Library of Guidelines. online, Available at: http://www.engineeringtoolbox.com/mass-weight-d_589.html, Accessed 22 October 2012.