1. The problem statement, all variables and given/known data Mass m1 = 11.9 kg is on a horizontal surface. Mass m2 = 8.80 kg hangs freely on a rope which is attached to the first mass. The coefficient of static friction between m1 and the horizontal surface is μs = 0.526, while the coefficient of kinetic friction is μk = 0.168. (There is a picture with M1 on top of a ...lets say table..and the m2 box is on the side of the table with a pulley on the corner) If the system is in motion with m1 moving to the left, then what will be the magnitude of the system's acceleration? Consider the pulley to be massless and frictionless. 2. Relevant equations Extra notes from professor: The frictional force will always oppose the direction of relative motion (or impending motion). If the block on the horizontal surface is moving to the right, then the frictional force is to the left. If the block on the horizontal surface is moving to the left, then the frictional force is to the right. However, you should see from a force diagram of the block on the horizontal plane, the tension in the string is to the right in both cases (tensions can only pull). 3. The attempt at a solution I've tried different things by examples my professor has given me, however those included angles so I'm not sure how to do this one.