1. The problem statement, all variables and given/known data Hello. I am working on a physics lab where we pushed a wooden block (weighed at 255.2 g) towards a motion detector. Through this we were able to determine its acceleration. After five trials we repeated the experiment, but with an additional 500 g weight on top. From this data I need to find the coefficient of kinetic friction. 2. Relevant equations f = (u_k)N = (u_k)mg 3. The attempt at a solution I know mg, but I don't know the frictional force or u_k. Only one of these have to be known, but I'm not sure how to get there using the acceleration of the block.