Assertion: airfoil's lift | /r/HasProperty | force
Facets:
Source sentences:
text: The lift and drag of a wing are forces that will vary with the density of the air, the area of the wing, the square of the air velocity, and the angle of attack of the wing as well as other parameters.
text: Lift and weight are two of the four forces acting on an airplane, the other two are drag and thrust (see Figure 1).