Question
Mon May 07, 2012 By: Tanmay

Expert Reply
Tue May 08, 2012
       
when an object is immwersed in a liquid, it displaces a certain amount of liquid(whose volume is equal to the vo;lume of the immersed part of the object). that liquid exerts an upthrust on the object inthe given direction as shown.
So when an object is immersed in a liquid, two forces act on it:
1. weight of the object which acts downwards say W1=Vdsg   ds is density of solid,V=volume of solid
2. upthrust which acts upwards say w2=vdlg   dl is density of liquid, v=volume of solid which is inside liquid. 
ifw1>w2 then the object sinks
ifw1<w2 then the object floats
w1=w2 then the object floats inside liquid
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