1. The problem statement, all variables and given/known data 1. A child sits in a sled on a horizontal snowy surface. The combined mass of the child and the sled is 30 kg. The static coefficient of friction is 0.2 and a kinetic coefficient of friction of 0.15. How much force does it take to initiate movement of the sled? (59 N) 2. Rework #1 for a force oriented at 30 degrees to the horizon. (61N) 3. Rework #1 for a surface oriented at 10 degrees to the horizon such that the sled is to be pulled up the incline. The force is applied to the sled parallel with the surface of the snow. (109 N) The answers are given in parenthesis but I can't figure out how to come up with them. 2. Relevant equations force of friction=coefficient of friction*normal force 3. The attempt at a solution #1 is easy and is just equal to 9.8*30*.2 but #2 and #3 i have not been able to get.