Discussion

al95ireyiz you need to find a first meter which the rocket will travers in time less than $T$. Given the rocket is constantly accelerating, it will take less and less time to traverse each meter of the rocket's path. In the example the distance of $1$ meter will be traversed in $\sqrt{2}$ seconds, the distance of two meters will be traversed in $2$ seconds, meaning the second meter will be traversed in less than $1$ second.

I have corrected English statement because it was badly transated