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USSR in WW2
Physics
Chemistry
Boats and Watercraft

Why a ball made of steel sinks in water while a boat made of steel easily sails in water?

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February 01, 2009 3:02PM

according to Archemidies principle ,"when a body is dipped in water its weight is reduced , this reduction in weight s eqivalent to the volume of water which replaced by the body." when a steel ball dropped in water the weight of replaced water by the ball is less than weight of the ball , so the ball sinks. But in the same condition the volume of water replaced by the boat is more wieghy in comparision to the weigh of boat , hence it floats. The term for this is Bouyance. It also explains why a Dirigible(Zeppelin) airship floats in the air. The Volume of Dirigible weighs less than the Air it displaces. Believe it or not, the same is true for Steel Ships. What I find hard to fathom is how a Ship full of heavy crude Oil floats?