9. When a copper body is immersed in water it displaces 20 kg of water. How much is the buoyant force acting on the copper body in newtons ? (g = 10 m/s)
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Answer: According to Archimedes' principle, this buoyant force is equal to the weight of the water that got displaced by the immersion of the object in it. ∴ the buoyant force acting on the object is obtained to be Fb=200N . So the correct option is B.
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