A 5000-Kg Freight Car Runs into a 10,000-Kg Freight Car

question 12

Multiple Choice

A 5000-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/s
• B)5 m/s
• C)6 m/s
• D)8 m/s
• E)none of these

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