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Answer on Mechanics | Relativity Question for flo

Question #2378
A 9500 kg boxcar traveling at 18.0 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 8.5 m/s.What is the mass of the second car?
Expert's answer
Denote the mass of the second car as m. Using the Momentum concervation law, we can write
9500*18 = (9500 + m)*8.5;
m = 10617.6 kg.

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