What difference does the length of a train make to stopping power? ?

Question

Just as a grape falls at the same rate as a grapefruit, according to the laws of physics, shouldn't a train pulling 100 cars be able to stop at the same rate as a train pulling 5 cars? I'm assuming that there are breaks on every wheel right? That would make sense. That's why there's 14, 18, 22, & 26 wheelers. The greater the load, the more axles & breaking power. Does it take a train pulling 3 cars over a mile to stop?

Answer 1

the more mass that a train has, the more momentum that the train will carry. and no not every wheel has a set of brakes on it, but you also need to take friction into account, smooth metal wheels on smooth metal tracks do not make for the best traction, that is why locomotives carry sand on them to spray it on the tracks when it is climbing a hill.