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!!

1 answer

conservation of momentum:

9600*17+m*0=(m+9600)9
solve for m.