Drax152
10.03.2020 •
Mathematics
A small propeller airplane can comfortably achieve a high enough speed to take off on a runway that is 1/4 mile long. A large, fully loaded passenger jet has about the same acceleration from rest, but it needs to achieve twice the speed to take off. What is the minimum runway length that will serve
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Ответ:
1 mile
Step-by-step explanation:
v² = u² + 2as
Since initial speed is 0,
v² = 2as
a = v²/2s
v²/2(¼) = (2v)²/2s
v²/½ = 2v²/s
2 = 2/s
s = 1
Ответ:
D is the answer I just took the test.