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Physics, 06.12.2019 05:31 Kin90ful

A5000-kg freight car runs into a 10,000-kg freight car at rest. they couple upon collision and move with a speed of 2 m/s. what was the initial speed of the 5000-kg car? a) 4 m/sb) 5 m/sc) 6 m/sd) 8 m/se) none of these

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A5000-kg freight car runs into a 10,000-kg freight car at rest. they couple upon collision and move...
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