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OpenStudy (anonymous):
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OpenStudy (anonymous):
A single 1,300 kg cargo train car is rolling along a train track at 2.0 m/s when 400 kg of coal is dropped vertically into it. What is its velocity right afterward? Assume a closed system. (Points : 1) 1.5 m/s 2.0 m/s 6.5 m/s 0.0011 m/s
OpenStudy (anonymous):
d
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