1. The problem statement, all variables and given/known data http://i241.photobucket.com/albums/ff4/alg5045/MLD_2l_15_001.jpg A small box of mass m1 is sitting on a board of mass m2 and length L. The board rests on a frictionless horizontal surface. The coefficient of static friction between the board and the box in us. The coefficient of kinetic friction between the board and the box is, as usual, less than us. Throughout the problem, use g for the magnitude of the acceleration due to gravity. In the hints, use Ff for the magnitude of the friction force between the board and the box. Find Fmin, the constant force with the least magnitude that must be applied to the board in order to pull the board out from under the box (which will then fall off of the opposite end of the board.) Express you answer in terms of some or all of the variable us, m1, m2, g, and L. Do not include Ff in your answer. u = mu 2. Relevant equations F=ma fs = N(us) 3. The attempt at a solution So I know the free body diagram for m1 has the weight down and a normal force up. The free body diagram for m2 has the weight1 and weight2 down and a normal force up. It also has F going to the right and fs going to the left. I'm not sure if these free body diagrams are completely right or not.