1. The problem statement, all variables and given/known data http://courses.washington.edu/mengr230/sp11/handout/n25_ImpulseMomentum.pdf [Broken] the problem at the bottom 2. Relevant equations on the link 3. The attempt at a solution I wrote out the equation and I don't really know where the friction factors in. I'm pretty much 100% lost on this. I've done a good amount of impulse and momentum problems but this one is stumping me.