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
Correct Answer:
Verified
Correct Answer:
Verified
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