The lifting force, F, exerted on an airplane wing varies jointly as the area, A, of the wing's surface and the square of the plane's velocity, v. The lift of a wing with an area of 300 square feet is 12,000 pounds when the plane is going 110 miles per hour. Find the lifting force on the wing if the plane slows down to 100 miles per hour.

Makayla Reilly 2022-09-13 Answered
The lifting force, F, exerted on an airplane wing varies jointly as the area, A, of the wing's surface and the square of the plane's velocity, v. The lift of a wing with an area of 300 square feet is 12,000 pounds when the plane is going 110 miles per hour. Find the lifting force on the wing if the plane slows down to 100 miles per hour.
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Answers (1)

Penelope Powers
Answered 2022-09-14 Author has 12 answers
The lifting force F. Varies Jointty as the area A of Square of velocity V
So,
F A v 2 F = k A v 2
Now,
At A = 300  ft 2 , v = 11  m/h F = 12000  pounds
So,
12000 = k ( 300 ) ( 110 ) 2 k = 12000 ( 300 ) ( 110 ) 2
Now
F = 12000 ( 800 ) ( 110 ) 2 [ 300 × 100 2 ] F = 12000 × 100 121  founds F = 9917.355  founds F 9917  founds

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