1. The problem statement, all variables and given/known data thin, hollow 60.0 g section of pipe of radius 14.0 cm starts rolling (from rest) down a 17.5° incline 5.60 m long. (a) If the pipe rolls without slipping, what will be its speed at the base of the incline? (b) What will be its total kinetic energy at the base of the incline? (c) What minimum value must the coefficient of static friction have if the pipe is not to slip? 2. Relevant equations 3. The attempt at a solution I got a) V=sqrt(gh) V=4.06m/s and b) KE=mv^2=mgh KE=0.989J which are correct. c) I need help with this one, I am not sure where to begin.