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Grade: 9
        Can a body displaced water in kg wt more than its weight in air?2.does buoyant force depend on mass of body or mass of water displaced in any case ?3.two bodies are in equibrilium when suspended in water from arms of a balance .The mass of one body is 36g ,its density is 9g/cm3 .If mass of other is 48g,its density in g/cm3 is:A)4/3   B)3/2.  C)3   D)5
2 years ago

Answers : (1)

anurag
21 Points
							Hi friend,Answering your first question---The amount of any liquid displaced by a body depends upon its volume.Theres nothing to do with its weight.The volume of the body submerged in liquid is equal to the volume of the liquid displaced by it.This is archimedes principle.Answering your second question----Yes,buoyant force depends upon the mass of liquid displaced.It is given by the relation---          F=Vdg ,where V is volume of liquid displaced,d is density of liquid,g is gravity.Answering your third question------The main point of question is the bodies are in equilibrium.Therefore the net force on them are equal.That is net force on first body=36g-(36/9)g=32g.        (Taking density of water as 1gm/cm3)And 48g-Vg is net force on another body.And they are equal.Therefore on solving we get V=16.And we finally got the density=3.
						
2 years ago
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