To find: The lift experienced by the plane travelling at with wing area of .
The lift experienced by the plane is .
Lift is jointly proportional to square of speed of plane and area of its wing.
Lift experienced is if plane travels at with wing area of .
The given variation is, lift is jointly proportional to square of speed of plane and area of its wing.
Here, is constant of proportionality.
First calculate constant of proportionality.
Substitute for , for and for in equation (1) and solve for .
Simplify the above equation and get the value of .
Now use the value of and find lift for given speed and wing area.
Substitute 40 for , for and 0.00136 from equation (2) in equation (1).
Thus, the value of lift experienced by the plane is .
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