1. The problem statement, all variables and given/known data The whole problem is in variables, which tends to confuse me a little. We have two blocks that collide, Ma and Mb. Initially Ma experiences a positive velocity. Mb experiences a 0 velocity. Finally, Ma experiences a negative velocity, while we do not yet know Mb's final velocity. Mb=3Ma Find which one of the blocks (if either) has a larger change in the magnitude of the momentum. Explain. If the initial speed of block A is 20 m/s and the final speed is 5 m/s. What is the final velocity of block b? In which case, if either, does block a exert a larger impulse on block b? 2. Relevant equations p=mv m1v1=m2v2 3. The attempt at a solution 1) I'm not sure how I would calculate variables with a change in magnitude any further than this ΔPa= -MaVaf-MaVai= -2 ΔPb= MbVb-0=MbVb So, block A has the larger change in the magnitude of the momentum since it would change by 2MaVa, while block B changes by 1MbVb. 2) Pai+Pbi=Paf+Pbf Ma(20m/s) +0=Ma(-5m/s)+ 3MaVbf divide Ma out of the left side, and the rest of the Ma's cancel. 20m/s= -5m/s+3Vbf 25m/s=3Vbf Vbf=8.3m/s 3)I'm not sure how to calculate this. I know Impulse= J= Δp, and I know that block A overall exerts the greater magnitude of momentum. I guess for "which case" it must mean initial or final. I think in the final case block A would be exerting a greater impulse on block b because that's when block B actually has a velocity and moves from the impact of block a. But im not sure how that relates to Δp, if we aren't dealing with both the initial and final, rather just one "case".