How fast can trains go?
user
That depends on the kind of train, the length of the train, the density of the track, the grade, and the direction of the train.
assistant
What about coal trains?
user
I’m not sure what you mean by “coal trains”.
assistant
Oh, I mean trains pulled by a steam locomotive.
user
They can go anywhere from 50 miles per hour, up to 130.
assistant
What if it's a steam locomotive pulling 5 cars and a caboose?
user
It’s hard to say exactly what the top speed would be, but the maximum safe speed for a passenger train is 79 mph.  The maximum speed for a coal train that is pulling that many cars is about 49 mph.
assistant
How fast can trains go?
user
That depends on the kind of train, the length of the train, the density of the track, the grade, and the direction of the train.
assistant
What about coal trains?
user
I’m not sure what you mean by “coal trains”.
assistant
Oh, I mean trains pulled by a steam locomotive.
user
They can go anywhere from 50 miles per hour, up to 130.
assistant
What if it's a steam locomotive pulling 5 cars and a caboose?
user
I’m not sure what you mean.  Can you explain?
assistant
How fast can trains go?