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OpenStudy (anonymous):
A 1.38×10^4 kg railroad car moving at 6.68 m/s to the north collides with and sticks to another railroad car of the same mass that is moving in the same direction at 1.40 m/s. What is the velocity of the joined cars after the collision?
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OpenStudy (anonymous):
Im confused on how to solve this i have 13800kg(6.68m/s -13800kg(1.4m/s)=13800(Va)-13800(Vb)
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