Závažné těžiště - bože, to už je dávno :-)

Závažné těžiště - bože, to už je dávno :-)

A fascinating conversation piece that illustrates the principle of center of gravity! A small hole in an oak board allows you to balance a 2-liter soda bottle at an angle that appears to defy gravity.

A fascinating conversation piece that illustrates the principle of center of gravity! A small hole in an oak board allows you to balance a 2-liter soda bottle at an angle that appears to defy gravity.

Balancing Bird Center of Gravity Physics Toy 6.5 inch Wing Span [Toy] | Toys Central

Balancing Bird Center of Gravity Physics Toy 6.5 inch Wing Span [Toy] | Toys Central

Center of gravity

Center of gravity

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