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The velocity of the wind over the surfac...

The velocity of the wind over the surface of the wing of an aeroplane is `80ms^(-1)` and under the wing `60ms^(-1)`. If the area of the wing is `4m^(2)`, the dynamic lift experienced by the wing is [density of air `=1.3kg.m^(-3)`]

A

3640 N

B

7280 N

C

14560 N

D

72800 N

Text Solution

Verified by Experts

The correct Answer is:
B
`F=(d)/(2)(V_(2)^(2)-V_(1)^(@))A`
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