1. The problem statement, all variables and given/known data A box with a mass of 20N is tied to another box with a mass of 15N hung over a pulley on an incline of 10 deg. please find the minimum coefficience (mu) for remaining stationary 2. Relevant equations Not too sure, F(mu)=(mu)N N being normal force 3. The attempt at a solution 3.47/19.70 = (mu)19.70/19.70 mu =0.176 Im not sure if there are more steps beyond this, but this is what I got for mu any help on this please?