A body having weighs 10 Newton in air and weighs 4N in water. Find the upthrust in Newton.
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according to archimedes principles when a body is fully or partially immersed in a fluid at the rest it appears to lose weight . In order word
Apparent weight W=W-fb
where fb is buoyant force which equal
to weight and displaced liquid
Apparent weight 10N = 4N -fb
fb=6N
or the weight of the liquid displaced by the object 6N
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