A 7200kg boxcar traveling at 170ms strikes a second boxcar
A 7200kg boxcar traveling at 17.0m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 7.5m/s .What is the mass of the second car?
Express your answer using two significant figures.
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a 7200kg boxcar traveling at 170ms strikes a second boxcar at rest the two stick together and move off with a speed of
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