1. The problem statement, all variables and given/known data 620 seconds after starting its take-off, a 260000 kg jet reaches its cruising altitude of 9200 meters and flies with a speed of 235 m/s. Neglecting friction, what has been the average power output of the engines? 2. Relevant equations ΔKE = Work Power = Work/time 3. The attempt at a solution Initial KE = 0 Final KE = .5*260000*235^2 = 7179250000 Power = 7179250000/620 = 11579435.48 Watts Can someone see an issue with what I am trying to do here? I tried to type in this answer but apparently it is wrong.