1. The problem statement, all variables and given/known data Consider a bullet of mass m fired at a speed of V0 into a wooden block of mass M. The bullet instantaneously comes to rest in the block. The block with the embedded bullet slides along a horizontal surface with a coefficient of kinetic energy [tex]\mu[/tex]. How far does the block slide before it comes to rest? Express your answer in terms of m, M, [tex]\mu[/tex] and g. 2. Relevant equations W = Fs W = KEf - KE0 where s = displacement 3. The attempt at a solution I started by saying W = Fs and thought the only net force working here is kinetic friction. so W = FN [tex]\mu[/tex] s and since FN = mg i said... W = (m +M)g [tex]\mu[/tex]s then i said since W = KEf - KE0 .... (m + M)g[tex]\mu[/tex]s = KEf - KE0 is this the right appoach? I cant use conservation of momentum since the sum of external forces arent 0, im assuming since they give the coefficient of kinetic friction.