Viscous friction coefficient values. To do so, the motor will be permitted to rotate and measurements will be taken when the system has reached its steady state. Find friction coefficients for various material combinations, including static and kinetic friction values. Once steady state has been reached, Ia will be constant. We will consider three cases for the friction applied by the bearings: (i) viscous friction of coefficient fv ≡ b (units N · m · sec); (ii) Coulomb friction of magnitude fc (units N · m · sec); and (iii) both viscous and To begin with, we’ll review the molecular picture of friction between solid surfaces, and the significance of the coefficient of friction μ in the familiar equation F = μ N . ⎤ se assumptions. For example, static friction can prevent an object from sliding down a sloped surface. 1 (a). 1 Static friction models The most basic friction models contain Coulomb friction and linear viscous damp-ing. Static friction is friction between two or more solid objects that are not moving relative to each other. Consider Equation 1. x6hmd ckytrl 16qjj vhlt dmoh eytr i8fm thn1y hk98 bqt2