1. The problem statement, all variables and given/known data A train starts from rest. The train (including the locomotive and all the freight cars) is 120 m long. A person standing still next to the front train (not in front of it -- she is NOT run over!) notices that the end of the last freight car passes her exactly 2 minutes after the train started moving. (i) What is the average speed of the train during the 2-minute time interval? (ii) Assuming that the train accelerates at a constant rate, what is the speed of the train when the end of the last freight car passes the observer? I can figure out i) just fine as average speed is 120m/120sec to get 1 m/s. I don't know why ii) is confusing to me, but it is. It seems straightforward but I don't know how to get the speed of the train when it passes the person. Wouldn't it also be 1 m/s? Speed is just a scalar so how does acceleration come into play?