Compute all parts of given problem:
Problem: The rolling resistance for steel on steel is quite low; the coefficient of rolling friction is typically ur=0.002. Suppose a 180,000kg locomotive is rolling at 21m/s on level rails.
Part A: If the engineer disengages the engine, how much time will it take the locomotive to coast to a stop?
Part B: How far will the locomotive move during this time?
I want help to determine how much time will it take the locomotive to coast to a stop.