What is the lift (in newtons) due to Bernoulli\'s principle on a wing of area 84

Question

What is the lift (in newtons) due to Bernoulli's principle on a wing of area 84m2 if the air passes over the top and bottom surfaces at speeds of 240 m/s and 150 m/s, respectively? Express your answer to two significant figures and include the appropriate units. What is the lift (in newtons) due to Bernoulli's principle on a wing of area 84m2 if the air passes over the top and bottom surfaces at speeds of 240 m/s and 150 m/s, respectively? Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

You need density of air, ?, which is 1.2754 kg/m3 at sea level.
The difference in pressure between top and bottom surfaces is found by the equation P2 - P1= 1/2 ?(V1^2 - V2^2)
So, ?P = 1.2754/2[(240)^2 - (150)^2)]
?P = 22067.37 N/m^2
Lift = 84 m^2 x 22067.37 N/m^2 = 1.85 x 10^6 N

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