The 32,000-lb airplane lakes off from rest in the position .s = 0. The total tangential fo...

The 32,000-lb airplane lakes off from rest in the position .s = 0. The total tangential force exerted on it by its engines and aerodynamic drag (in pounds) is given as a function of its position s by ∑Ft, = 45,000 – 5.2s. Use the principle of work and energy to determine how fast the airplane is traveling when its position is s = 950 ft.