A 1,600 kg train car rolling freely on level track at 16 m/s bumps into a 1.0 × 103 kg train car moving at 10.0 m/s in the same direction, and the two latch onto each other and continue together. What is their final speed?
16 m/s
6.0 m/s
10 m/s
14 m/s

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whats the formula again?

is the ans 16m/s

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