Take Off A jet with mass m 5x 104 kg jet accelerates down the runway for takeoff
ID: 3281106 • Letter: T
Question
Take Off A jet with mass m 5x 104 kg jet accelerates down the runway for takeoff at 1.8 m/s2 What is the net horizontal force on the airplane as it accelerates for takeoff? 90000 What is the net vertical force on the airplane as it accelerates for takeoff? N Submt Once off the ground, the plane climbs upward for 20 seconds. During this time, the vertical speed increases from zero to 15 m/s, while the horizontal speed increases from 80 m/s to 96 m/s What is the net horizontal force on the airplane as it climbs upward? 40000 4 What is the net vertical force on the airplane as it climbs upward? 37500 N Submi After reaching cruising altitude, the plane levels off, keeping the horizontal speed constant, but smoothly reducing the vertical speed to zero, in 13 What is the net horizontal force on the airplane as t levels off? N Submit What is the net vertical force on the airplane as it levels off?Explanation / Answer
The answers entered by you until [4] are all correct and therefore I have not included their solutions.
5]
Horizontal speed here is constant and so the acceleration is zero in the horizontal direction. Hence the net horizontal force on the airplane as it levels off is zero.
6] Net vertical force will be:
F = ma = 5 x 104 x [0 - 15]/13 = - 57692.3077 N.
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