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 70m s-1 and 63 m s-1 respectively. What is the lift on the wing, if its area is 2.5 m2 ? Take the density of air to be 1.3 kg m-3.

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1513 N

1513 dynes

151.3 N

151.3 dynes

answer is A.

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Detailed Solution

F=P2−P1A; P2−P1=12ρv12−v22

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