Question

An airplane starts at a stand-still and speeds up with an acceleration of 2.9 m/s2. If the runway is 158 m long, how long will it take for the airplane to reach the end of the runway.

Answer 1

d=(at^2)/2
The time for the airplane to reach the end of the runway is
t=√(2d/a)
t=√((2(158))/2.9)=10.4 s