Multiple Choice
A 7000-kg coal car of a train coasts at 7.0 m/s on a frictionless track when a 3000-kg load of coal is dropped vertically onto the car.The coal car's speed after the coal is added is
A) 2.1 m/s
B) 3.0 m/s
C) 4.9 m/s
D) 7.0 m/s
E) 16 m/s
Correct Answer:
Verified
Correct Answer:
Verified
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