1. The problem statement, all variables and given/known data A certain airport runway of length L allows planes to accelerate uniformly from rest to takeoff speed using the full length of the runway. Because of newly designed planes, the takeoff speed must be doubled, again using the full length of the runway and having the same acceleration as before. In terms of L, what must be the length of the new runway? 2. Relevant equations Not sure how to evens start. 3. The attempt at a solution in my head i said that the runway would double buy i was wrong.