1. The problem statement, all variables and given/known data a rotating cylinder of radius 3 m is set in rotation at an angular speed of 5 radians/second. the floor then drops away, leaving the riders suspended against the wall in a vertical position. what minimum coefficient of friction between a rider's clothing and the wall is needed to keep the rier from slipping? 2. Relevant equations 3. The attempt at a solution i've attempted to draw a free body diagram, cause i'm pretty sure that's the first thing i have to do. but i have to say, this FBD, is VERY VERY tricky.