# M i right

1. May 16, 2009

is this the wriye formula of cofficient of friction

22/7 x D x n/12

2. May 16, 2009

### tiny-tim

Welcome to PF!

Whether that is a formula for friction or the distance a cylinder rolls (assuming that 22/7 is an approximation for $\pi$) or the curvature of a hypersurface depends entirely upon the application- which you did not tell us!