Archimedes Principle

• states that an object which is partially or wholly immersed in a fluid is acted upon by an upward buoyant force equal to the weight of the liquid it displaces.

Buoyant Force

• buoyant force is the weight of liquid displaced by an object
• it is created by the increase of pressure with depth.
• it depends on : 

a) volume of the object                                                                                                                                                         b)  density of the liquid

• formula :

                     apparent immersed weight = weight - weight of displaced liquid

For more information on buoyant force, log on too...

http://www.physics.uoguelph.ca/Fendt_app/phe/buoyforce.htm

Principle of Floatation

• states that a floating body displaces its own weight of the liquid in which it floats.
• for an object floating in a liquid : 

                         the weight of liquid displaced = the weight of the body