A 6.0 kg object at rest explodes into two parts. If part A has mass 2.0 kg and a velocity of 18.0 m/s right, what is the velocity of part B?

*The answer is 9 m/s, but I can't seem to get the answer. Any help would be appreciated!*

2 answers

conserve momentum
6.0 * 0 = 2.0*18.0 + (6.0-2.0)v
Oh, I get it now! Thanks very much for your help!