1. The problem statement, all variables and given/known data A 9.1 g ball is hit into a 98 g block of clay at rest on a level surface. After impact, the block slides 8m before coming to rest. If the coefficient of friction is 0.60, determine the speed of the ball before impact 2. Relevant equations Ek+1/2 mv^2 Ff=uFn 3. The attempt at a solution First of all, I calculate friction force. Fn=(0.098)(9.8) =0.96 Ff=(Fn)(Uk) =5.9 N I find acceleration of the block: -5.9 N = 0.098a -60 m/s^2=a At this point Im stuck i am unsure of what to find next given that i know no velocities, except the initial velocity for the block. This problem i should solve using conservation of energy and momentum.