For the fl at sanding disk of radius a, the pressure p developed between the disk and
Chapter 6, Problem 6/91(choose chapter or problem)
For the flat sanding disk of radius a, the pressure p developed between the disk and the sanded surface decreases linearly with r from a value \(p_0\) at the center to \(p_0/2\) at r = a. If the coefficient of friction is \(\mu\), derive the expression for the torque M required to turn the shaft under an axial force L.
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