24. MASS PROPERTIES

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In addition to basic statics this topic will lead in to estimating strengths of beams, dynamic behavior, mass, etc.

Important terms,

A simple way to illustrate the moment arm effect of gravity about a centroid is by considering an exaggerated T shape that is supported by two cables, one at either end.

A note of interest, when the object is symmetrical the centre of mass and centroids will be the same. Another term of significance is the centre of gravity, but unless we have a part with a significant gravity gradient across it, this will be the same as the centre of mass. Unless dealing with very sensitive equipment, or astronomically significantly distances, the centre of gravity, and centre of mass can be considered equivalent.