Transcription of BUOYANCY FLOATING AND SINKING - Scientific Research …
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BUOYANCY FLOATING AND SINKING - Scientific Research …
VIS UAL PHY SICS. S c hoo l of P hys i cs U n i ve rs i ty of Sy d ney A u s t r a l i a BUOYANCY . FLOATING AND SINKING . Why do ice cubes float on water? ? Why does a hot air balloon rise? What is wrong with the picture of the ship on the left? ? a03/p1/ 1. Archimedes' Principle When an object is completely or partially immersed in a ! fluid, the fluid exerts an upward force on the object equal to the weight of the fluid displaced by the object. When a solid object is wholly or partly immersed in a fluid, the fluid molecules are continually striking the submerged surface of the object. The forces due to these impacts can be combined into a single force the buoyant force. The immersed object will be lighter It will be buoyed up by an amount equal to the weight of the fluid it displaces. Partially submerged FLOATING a03/p1/ 2. FLOATING : partially submerged Weight of object < weight of fluid that can be displaced by object Volume of displaced water <.
A steel ship can encompass a great deal of empty space and so have a large volume and a relatively small density. Volume of water displaced A 200 tonne ship enters a lock of a canal.
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