1. The problem statement, all variables and given/known data In a conservation of momentum lab, two objects were collided together, velocity before and after the collision were measured. The problem asks how the momentum compares before and after I'm really confused about the variables here... In the hypothesis it asks to relate the momentum of a system before and after collision into a "if...manipulated is... then...responding is" format How do I write it into an if...then... format?!? I realize that the independent/manipulated variable is the initial given velocity but I'm confused about the responding variable, Is it the after crash velocity or the after crash momentum?