an iron nail sink in water but ship made of the same material float on it why
Answers
Because of buoyancy. A needle cannot stay afloat because the mass of water removed by it is lesser than the mass of needle itself. But the volume if a ship is much bigger, so the mass of water removed by it is greater than that of ship. The removed water creates an upward force on the object immersed in a fluid, which has to be greater that the weight of the object itself to make it float. In this case this it is greater in ship made of iron. That is why the bottom part of a ship is wide.
The answer is......
The density of nail (as of iron) is much larger than the water. So it sinks easily. The weight of the water displaced by the ship is equal to its weight, so it floats. Whereas the weight of the water displaced by the iron nail is less than its weight so the iron nail sinks.
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