An airplane starts from rest and accelerates at 10.8 m/s^2. what is its speed at the end of a 400 m-long runway?

Final velocity will be 92.851 m/sec

Explanation:

We have given length of runway that is s = 400 m

Acceleration

As the airplane starts from rest so initial velocity u = 0 m/sec

Now according to third equation of motion

v = 92.851m/sec

So final velocity will be 92.851 m/sec

would be false hope this out

0.11 m/s and 0.28 m/s should be correct