what is the reason to be a body to be
lighter in water?
Answers
Answer:
In air, there is a bouyant force equal to the mass of air being displaced by the object, and if the object is on a horizontal surface, an equal and opposite force of the weight of the object (normal force). According to Archimede's principle, in water there is also a bouyant force, equal to the mass of the water displaced by the object, pushing up on the object, and also a normal force if the object is resting on a horizontal surface. However, since air is less dense than water, the bouyant force of air is less than that of water, so the object in air seems heavier.
They seem to feel lighter, though, because of buoyancy. Archemedes's principle states that the force pushing on an object under water, is equal to the mass of the water it has pushed out of the way. So things apear lighter because the water is actually helping to push it up..........
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