1. The problem statement, all variables and given/known data A vertical cylinder is sitting against a wall. It has a weight of 20N and no given radius. A force is applied tangentially in a vertical direction on the side not against the wall. The coefficient of friction is 0.499 for all surfaces. What is the maximum force so that the cylinder will not rotate? 2. Relevant equations τ= Fr-f(bottom)r-f(wall)r=0 f=μN 3. The attempt at a solution I set up the necessary equations and I thought that since there wasn't a normal force applied horizontally, the wall didn't have any friction so I neglected it and answered 9.98. That wasn't correct. Sorry about the sideways picture.