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In a test experiment on a model aeroplane in a wind tunnel,the flow speeds on the upper and lower surfaces of the wing are 70ms1 respectively.What is the lift on the wing if its area is 2.5m2?Take the density of air to be 1.3Kgm3

(A)1×103N(B)1.45×103N(C)1.51×103N(D)2.1×104N

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