The story isn't up yet on CNN, but an announcement just went out noting that there's been a train crash in Argentina...apparently a train derailed in the station in Buenos Aires, and so far the story notes 40 dead and 550 injured
Okay, the article didn't have that much detail when I read it. It did mention a car shoving itself six meters into another car, and if people were standing between the cars when they accordioned, that explains much more. I hadn't done the math as far as force = mass x acceleration; it's horrible that something as "slow" as 12 mph can cause so many injuries and deaths. When I read the original article, I pictured the train going 30-40 mph or more.The damage to the front end as shown in the picture look fairly reasonable for 12 mph (20 kph) Remember the total mass of the train. It is not like a single car hitting a wall, but more lke the firs car in a string of cars hitting the wall.
It states "Morning rush hour, so the train was probably packed. The number of deaths and injuries quote in another article, 49 deaths adn over 600 injuries would also tell you that. The large number of injuries at the low speed are likely because in addition to the people aleardy standing many of the seated passengers were trying to get their things together to get off. I would suspect that most of the deaths were people at or near car ends that wwere crushed in the relatively minor "accordioning" that appears to have occurred.
Here is another BBC article with more text to it.
www.bbc.co.uk/news/world-latin-america-17129858
www.bbc.co.uk/news/world-latin-america-17131192
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