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Physics, 04.11.2020 17:50 BluHope19

A 500-kg sack of coal is dropped on a 2000-kg railroad flatcar which was initially moving at 3 m/s. After the sack rests on the flatcar, the speed of the flatcar is:

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A 500-kg sack of coal is dropped on a 2000-kg railroad flatcar which was initially moving at 3 m/s....
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