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  • Air stream flows horizontally past an aeroplane wing of surface area 4 . The speed of air over the top surface is 6

Air stream flows horizontally past an aeroplane wing of surface area 4 m^2. The speed of air over the top surface is 60m/s and under the bottom surface is 40m/s. the force of lift on the wing is (density of air = 1kg/m^3)

Option: 1

800N


Option: 2

1000N


Option: 3

4000N


Option: 4

3200N


Answers (1)

best_answer

\\Pressure\ difference (\Delta P)=\Delta K E=\frac{1}{2} \rho\left(v_1^2-v_2^2\right)\\ or,\ \Delta P=\frac{1}{2} \times 1.0 \times(3600-1600)=1000 \mathrm{~N} / \mathrm{m}^2\\ F=(\Delta P) \times A=4000 \mathrm{~N}

Posted by

Devendra Khairwa

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