Asked by joelinho
a box of treasure with a mass of 92 kg and volume of 0.031metrecubic lies at the bottom of the ocean.how much force is needed to lift it?
Answers
Answered by
MathMate
Archimedes principle states that the buoyant force equals the weight of fluid displaced.
Fresh water has a density of
ρ=1000 kg/m³
Sea water from deep in the ocean has a mass density of ρ=1050 kg/m³.
Average sea water has a mass density of ρ=1030 kg/m³.
Net force to lift the object
=(m-ρv)g
=(92-ρ*0.031)*9.81 N
Do not forget that to "land" the object on the boat, the buoyant force does not apply any more when the object is in the air.
Fresh water has a density of
ρ=1000 kg/m³
Sea water from deep in the ocean has a mass density of ρ=1050 kg/m³.
Average sea water has a mass density of ρ=1030 kg/m³.
Net force to lift the object
=(m-ρv)g
=(92-ρ*0.031)*9.81 N
Do not forget that to "land" the object on the boat, the buoyant force does not apply any more when the object is in the air.
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