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Center of Mass

This demo shows the concept of the center of mass along a straight plane and  is the sum of the masses factored by their distances from a reference point.  Instructor may also want a digital balance. 

Center of mass

Where is the center of mass on this hammer?

Center of mass hammer

The balancing center of mass bird

Center of mass bird

 A double cone appears to roll uphill while its center of gravity lowers.

Double cone rolling incline