Circular Motion and Friction (PLEASE HELP!!!) 1. The problem statement, all variables and given/known data The coefficient of friction between a certain brass block and a large revolving turntable is µ = 0.21. How far from the axis of rotation can the block be placed before it slides off the turntable if the turntable rotates at a constant rate of 33 1/3 rev/min (so that it requires time T = 60/33.33 seconds to complete one revolution) ? 2. Relevant equations I think that µsN=4(pi^2)(mrf^2) should work, except I don't understand how to solve this sans any mass or other information. 3. The attempt at a solution All I can get is that T=3.49 rad/s. I just don't understand how to do this problem!