Oh my goodness, yes, you are right.
Thanks for the help... I got it now, and that makes sense. I was wondering how it would matter if the piece went forward and not backwards.
Thanks again. :)
Homework Statement
A spaceship of mass 2.00×10^6 kg is cruising at a speed of 6.00×10^6 m/s when the antimatter reactor fails, blowing the ship into three pieces. One section, having a mass of 4.60×10^5 kg, is blown straight backward with a speed of 2.10×10^6 m/s. A second piece, with mass...