1. The problem statement, all variables and given/known data A 10 kg rubber box is resting on a concrete floor. A force of 200 N is then applied to this box in a horizontal direction. What is the magnitude of the friction force on the box? 2. Relevant equations This is a question about applying newton's laws so Fsmax = μs η and η = mg. 3. The attempt at a solution I have had answers -200 N, 98.1N, and 200N in which they are all incorrect. I have an idea it could be 0 N since the net force would have to be 0 since it is at rest and there is a static friction present but I am not sure.