1. The problem statement, all variables and given/known data It's a snowy day and you're pulling a friend along a level road on a sled. You've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. You've been walking at a steady 1.5 m/s, and the rope pulls up on the sled at a 22 (DEGREE) Angle. You estimate that the mass of the sled, with your friend on it, is 57.0 kg and that you're pulling with a force of 78.0 N. What is the coefficient of friction? 2. Relevant equations F = ma F = Umg 3. The attempt at a solution Umg = mg U = (a/g) but in the description of the problem acceleration is 0 since the speed is constant right? So wouldn't U (friction) = 0? since (0/9.8) = 0?