Two trains move along a track with their respective velocities m/s and m/s. Suddenly, the conductors notice that they are headed toward each other. The above graph gives each train's velocity as a function of time as the conductors slow down their trains. The slowing processes begin when the two trains are m apart. What is the distance (in m) between the two trains when both trains have stopped?
The graph's vertical scaling is set by m/s.