An iron cube weighs 35.4 N in air. How much does this weigh in water? (The density of iron is 7.86 · 10³ kg / m³ and the density of water is 1.00 · 10³ kg / m³)
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It turns out that this buoyant force is equal to the weight of the fluid displaced by the object. The “apparent weight” can be found using a free body diagram: Apparent weight is equal to the actual weight (w=mg) less the buoyant force pushing up on the object.
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