a locomotive is accelerating at 1.6 meters per second it passes through a 20.1 meter wide crossing in a time of 4.03 seconds after the locomotive leaves the crossing how much time is required until it's speed reaches 5.3 meters per second

Answer 1

initial velocity=distance/4.03 assumeing the locomaotive length is zero. Length of the locomotive is not given, think about that.

use the initial velocity above, with a very short locomotive.

Vf=vi+at
solve for time t.