1. The problem statement, all variables and given/known data a 10 kg box is moving on a level floor. The coefficient of static friction between the box and floor is 0.3. What is the force of kinetic friction? 2. Relevant equations fk = FN * μk 3. The attempt at a solution I rearranged the formula so that everything was set equal to the normal force, but I'm convinced that there is information missing to solving this.