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63. ssm An airplane wing is designed so that
the speed of the air across the top of the wing is 251 m/s when the speed of
the air below the wing is 225 m/s. The density of the air is 1.29
kg/m3. What is the lifting force on a wing of area 24.0 m2? |
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We assume the height
difference between the top and bottom of the wind is negligible, so we can
ignore any change in gravitational potential energy of the fluid. Bernoulli’s principle then give us |
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For lift pressure on bottom
will be greater than pressure on the bottom
we solve for |
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Lift force can be found from |
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