Abstract
The Archimedes' principle and the concepts of equilibrium of forces and density are used to a simple theoretical description of the process of body floating in the water. The analysis is performed for containers easily found in quotidian and is based on the proportion among the air volume inside the container, the water volume within it and on the volume of the container walls. In following, direct experimental demonstrations are proposed.
Keywords:
Archimedes' principle; buoyancy; force equilibrium; density
