1. The problem statement, all variables and given/known data A person pushes with force of 220N on a 40 kg create. The coefficent of kinetic friction of 0.35. What is the magnitude of the frictional force? 2. Relevant equations Ff = uN 3. The attempt at a solution so do I just go Ff = 0.35*(40kg)(9.81m/s^2) Is that it? What is the 220 Force for?