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 180 square feet is 38,200 pounds when the plane is going at 140 miles per hour. 

Find the lifting force if the speed is 180 miles per hour. 

Answer rating: 100% (QA)

To solve this problem we can use the formula for joint variation F k A v2 wh... View the full answer