1. The problem statement, all variables and given/known data A dog pulls the rope of a 50 kg sled up a hill with an incline of 20° above the horizontal. The rope is directed 30° from the slope and the dog exerts a force of 200N on the rope. The force of friction is 50 N. What is the sled's acceleration? 2.The attempt at a solution Fnet = ma (Fapp) - (Ffriction) - (Fgx) = (50)(a) (200N cos30) - (50N) - (50 kg * 9.81 m/s/s * sin20) = (50) (a) a = -0.89 m/s/s. Therefore, the sled is going down hill?!