Principle Of Flotation, Archimedes Principle, Buoyant Force and How Ships Floats

  Buoyant Force
        > When a body placed in a fluid, the fluid exerts an upward force which is called buoyant force. The buoyant force is the pressure exerted on the body by the fluid. 
        >Pressure increases as the depth increases, the pressure on the bottom of an object is always larger than the force on the top. So the net upward force is larger at the bottom

Define Archimedes Principle     
 " Archimedes' principle states that the upward buoyant force exerted on a body in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces."

             ie, Buoyancy = weight of displaced fluid

>If the weight of the water displaced is less than the weight of the body, the body will sink.Otherwise the object will float

How Ships Floats (Principle Of Flotation)
>When a body displaces weight of water equal to its own weight, it floats. This is often called the principle of flotation
>A Ship displaces a weight of fluid equal to its own weight.
> Every ship must be designed to displace a weight of fluid equal to its own weight


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