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In a test experiment on a model aeroplan...

In a test experiment on a model aeroplane in a wind tunnel, the flow speeds on the upper and lower surface of the wing are `70 ms^-1 and 63 ms^-1` respectively. What is the lift on the wing if its area is `2.5 m^2`? Take the density of air to be `1.3 kg m^-3`.

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`1.5 times 10^3 N`
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