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  • The velocities on lower and upper surface of an aeroplane wing are <img alt="10 \mathrm{~m} / \mathrm{s}" src="https://entrancecorner.oncodecogs.com/gif.latex?10%20%5Cmathrm%7B%7Em%7D%20/%20%5Cmath

The velocities on lower and upper surface of an aeroplane wing are 10 \mathrm{~m} / \mathrm{s}. and 20 \mathrm{~m} / \mathrm{s} respectively. If area of the wing is 10 \mathrm{~m}^2, then what is the lift force on the aeroplane? (Density of air 1.2 \mathrm{~kg} / \mathrm{m}^3)

Option: 1

2500 N


Option: 2

1200 N 


Option: 3

1800 N


Option: 4

1600 N


Answers (1)

best_answer

F=\frac{1}{2} \rho_{\text {air }}\left(v_1^2-v_2^2\right) \cdot A

F=\frac{1}{2} \times 1.2\left(20^2-10^2\right) \times 10

F=1800 \mathrm{~N}

Posted by

Rakesh

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