If the weight of a body having volume 100 cubic meter is 1kg in air..then what will be its weight in water??

Question

anonymous · Answer

A kilogram isn't a unit of weight, it's a unit of mass.  "Weight" is a force that something with mass feels in gravity.  

The *weight* of an object changes depending on a lot of things - you can weigh a balloon in air, but it's quite difficult to weigh it with water.  And it would have a different weight on the moon versus on the earth.

The *mass* of that balloon, however, is the same no matter where you measure it.  

So for your question - if the *mass* of an object with a volume of 100 m3 is 1 kg in air, then its *mass* in water would be the same.

$u$hant · Answer

Mass is Universally constant physical quantity. And it doesn't changes the mass of any body whether you take that particular object to any corner of this Universe. In fact there is an error in your question because the unit of weight is not Kilogram(kg) but newton (n).To calculate the weight we also need the specific upthrust force produced by the water on that object.