Please Help! Friction Problem Hi all, this homework problem has been killing me. It is listed as easy but I just can't figure it out. Ill post it word for word: A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.4 m/s. If the coefficient of friction between the sled's runners and snow is 0.060 and the boy and sled together weigh 570 N, how far does the sled travel on the level surface before coming to rest? (in meters) Since we are looking for the position I started with the equation x = vt + 1/2at^2 but I dont know the acceleration or time. I did figure out the force using the equation f=un (335.16 N). Please help me! Any help is greatly appreciated!