This seems to require several unwarranted assumptions: that the acceleration is constant, that the airspeed and ground speed are the same, and that achieving takeoff speed is coincident with the wheels leaving the ground. In a real aircraft takeoff none of these is likely.
I see your points, and while that is probably true, in this question taken from a textbook, this is the data that we're given. Based off of the given data we show that acceleration is constant, and we would also have to make more assumptions about the wheels lifting off if we didn't assume it was coincident with the take off speed. You're absolutely correct that the problem is simplified from a true, real-life scenario, but the point of the problem is to practice applications of kinematics, and it achieves that. Thanks for your thoughts!
This seems to require several unwarranted assumptions: that the acceleration is constant, that the airspeed and ground speed are the same, and that achieving takeoff speed is coincident with the wheels leaving the ground. In a real aircraft takeoff none of these is likely.
I see your points, and while that is probably true, in this question taken from a textbook, this is the data that we're given. Based off of the given data we show that acceleration is constant, and we would also have to make more assumptions about the wheels lifting off if we didn't assume it was coincident with the take off speed. You're absolutely correct that the problem is simplified from a true, real-life scenario, but the point of the problem is to practice applications of kinematics, and it achieves that. Thanks for your thoughts!