A fast train bumps into a slow train going the same direcction, and they get coupled together.  The fast train was intially going 6.17 meters per second and the slow train 3.57 meters per second. Their masses are 25.2 and 27.5 tons, respexctively.  What is the final speed once  the two are coupled?

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A fast train bumps into a slow train going the same direcction, and they get coupled together. 

The fast train was intially going 6.17 meters per second and the slow train 3.57 meters per second.

Their masses are 25.2 and 27.5 tons, respexctively. 

What is the final speed once  the two are coupled?

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