Posted by **Jen** on Saturday, October 31, 2009 at 2:33pm.

A 9600 kg boxcar traveling at 17 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 9.0 m/s. What is the mass of the second car?

I know that this is an inelastic collision because the 2 stick together but I need help PLEASE!!

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