1. The problem statement, all variables and given/known data A prism has a mass of m = 80 g, and you wish to lift it, touching the upper two faces only. If the coecient of friction between the prism’s surface and your skin is = 0:4, what is the minimum force that must be applied to each face? 2. Relevant equations F=μR 3. The attempt at a solution I drew the forces perpendicular to the two surfaces. I don't really know how to resolve them, and how F=μR comes into it.