1. The problem statement, all variables and given/known data Where should the pilot start descent? The approach path for an aircraft should satisfy: i) The cruising altitude is h when descent starts. At horizontal distance. ii) The pilot must keep a constant horizontal velocity, Vx, throughout the decent. iii)|αy|≤ K << g k = constant g = gravity |αy| = vertical component of acceleration 1) Find a cubic polynomial y = P(x) = ax3 + bx2 + cx + d that satisfies: (i) on P(x) , P'(x) @ x = 0 , x = L 2) Use (i) , (ii) to show: (6hVx2) / L2 ≤ k 2. Relevant equations P(x) = ax^3 + bx^2 + cx + d (6hVx^2) / L^2 ≤ k 3. The attempt at a solution I was able to conclude that: y(0) = P(0) = d = 0 → P(x) = ax3 + bx2 + cx And @ x = L : P(L) = aL3 + bL2 + cL = y(L) = h Thats all I was able to get so far. I am stuck. If you guys need anymore info on the question let me know and ill do my best to help out Thanks!