How long does it take for a freight train to stop?

Question

going like 70 miles an hour

Answer 1

2.5 minutes unless it's longer than 1 mile.

Answer 2

How many licks does it take to get to the center of a tootise pop?

Answer 3

That is only one of the two required perameters necessary to asnwer the question....We need the weight of the train and number

of cars...A short train of heavily loaded cars will take a lot longer to

stop from 70mph than will a long train of light cars..