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A railroad car with a mass of 30,000 kg is moving at 2.0 m/s when it runs into an at-rest freight car with an equal mass. the cara lock together. what is their final velocity? A. 2.0 m/s B. 0.5 m/s C.
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A railroad car with a mass of 30,000 kg is moving at 2.0 m/s when it runs into an at-rest freight car with an equal mass. the cara lock together. what is their final velocity?

A. 2.0 m/s
B. 0.5 m/s
C. 60,000 kg-m/s
D. 1.0 m/s

User Hanumant
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1 Answer

3 votes
D. It is the same energy but now pushing twice as much, so it would be half as fast so 1 m/s
User Ephemerr
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