Airplane Wing Lift: 20m2, 300m/s & 280m/s

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In summary, the net upward force on an airplane wing of area 20 m2 can be calculated using Bernoulli's equation, which relates pressure in a fluid to the speed of flow. The different speeds of air flow across the top and bottom surfaces of the wing create a lift force, resulting in a net upward force.
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kitty9035
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Homework Statement


What is the net upward force on an airplane wing of area 20 m2 if the speed of air flow is 300 m/s across the top and 280 m/s across the bottom.


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The Attempt at a Solution



I have a feeling that this is an easy question, but i just don't know how to solve it! Any hints would be greatly appreciated.
 
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  • #2
Hint: there is a lift force is because the pressure on the top and bottom surfaces of the wing are different.

What equations do you know that relate pressure in a fluid to the speed of flow?
 
  • #3
So that would be Bernoulli's equation, right?
But how would you use that in this case?
 

1. What is the formula for calculating lift on an airplane wing?

The formula for calculating lift on an airplane wing is Lift = (Coefficient of Lift) x (Air Density) x (Velocity^2) x (Wing Area).

2. How does the size of an airplane wing affect its lift?

The size of an airplane wing, specifically the wing area, directly affects the amount of lift it can generate. A larger wing area results in a greater surface area for air to flow over, creating more lift.

3. How does the speed of an airplane affect its lift?

The speed of an airplane, specifically its velocity, is a crucial factor in determining lift. As the velocity increases, the amount of air flowing over the wing also increases, resulting in a greater lift force.

4. How do air density and altitude affect lift on an airplane wing?

Air density and altitude have a direct impact on lift. As altitude increases, air density decreases, meaning there is less air available to create lift. This can result in a decrease in lift force, unless compensated for by increasing the speed or angle of attack of the wing.

5. What is the significance of the coefficient of lift in airplane wing lift calculations?

The coefficient of lift is a dimensionless number that represents the efficiency of an airplane wing. It takes into account various factors such as the shape and angle of the wing, and is used in the lift formula to determine the amount of lift generated by the wing.

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