1. The problem statement, all variables and given/known data A Small boy is sledding on a snowy slope and looks very weary as he drags his sled up again after each run. Each time he pulls the sled up he makes an angle of 30 degrees with respect to the ground. The mu of kinetic friction is 0.10. At what angle should the boy be pulling to exert minimum force? 2. Relevant equations 3. The attempt at a solution By way of plugging and chugging various numbers, I believe that the angle should be 0. But to get a difinitive answer,our teacher hinted that I would need to use calculus, but I'm not readily famailar with exactly how to apply a sum of all forces equation in that manner.