1. The problem statement, all variables and given/known data A block slides down a frictionless hill, h=1.8m high. At the top of the hill the block has a speed of v=2.8m/s. At the bottom of the hill, the block travels over a patch of rough pavement and comes to a complete stop after s=5.0m distance due to friction. a) What is the coefficient of kinetic friction between the pavement and the block at the bottom of the hill? b) What is the magnitude of the averge acceleration of the block while traveling over the rough patch? 2. Relevant equations Fk=ukmg Wf=ukmg x s Work energy theorem: W=0.5mv22-0.5mv12 3. The attempt at a solution It seems that something is missing from this equation. Isn't mass a necessity here? Also, I'm not sure where to factor in the height of the hill into this equation.