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posted by Anonymous Saturday, November 21, 2009 at 5:01pm.

A 9000 kg boxcar traveling at 17.0 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 6.5 m/s. What is the mass of the second car?

See: http://www.jiskha.com/display.cgi?id=1258847132

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