Center of Mass

Pronunciation: /ˈsɛn tər ʌv mæs/ ?

The center of mass of an object is the geometric center of the object that acts as the center of gravity.[1] For 2-dimensional objects, this is the point on which the object will balance if placed on a pin. For 3-dimensional objects, this is point that acts a the center of gravity for the object.

The center of mass of a sphere is the center of the sphere. The center of mass of a triangle is the centroid of the triangle.


  1. center of mass. Encyclopedia Britannica. (Accessed: 2010-01-04). of mass.
  2. center of gravity. Encyclopedia Britannica. (Accessed: 2010-01-04). of gravity.

Cite this article as:

Center of Mass. 2010-01-09. All Math Words Encyclopedia. Life is a Story Problem LLC.


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2010-01-09: Added "References", 'center of gravity' (McAdams, David.)
2008-04-22: Initial version (McAdams, David.)

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