1. The problem statement, all variables and given/known data A sled is pulled over a horizontal surface where the kinetic coefficient of friction is .20. What is the minimum force necessary to keep the sled moving if its mass is 2 slugs? 2. Relevant equations fs = Ns(mg) 3. The attempt at a solution fs = (.20) (2 slugs) (32) =12.8 This problem has got me stumped. Please help! Thank You.