# coefficient of friction

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### the ratio of the weight of an object being moved along a surface and the force that maintains contact between the object and the surface

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s] Friction coefficient between the materials and metal walls [F,sub.
Wikipedia defines tribology as "the science and engineering of interacting surfaces in relative motion" There are no hard and fast rules for evaluating a polymer's tendency to feed, because the criteria noted--shape, size, and randomness--interact, and frictional force depends on contact area even though the friction coefficient remains essentially the same for given polymers.
The dependence of the kinetic friction coefficient on load under a speed of 100 mm/min: 1--friction between paper and print made using conventional inks, 2--friction between paper and print made using UV inks, 3--friction between paper and plane paper.
A slip force law with a marked adhesion optimum can be modelled using the friction coefficient decreasing with increasing slip (creep) speed between rail and wheel (Zhang et al.
Among these lubricants, PTFE particles provide very low friction coefficient but show a low useful load-bearing capacity and should only be considered at low-speed wearing systems.
In figure 5 we observe that at constant angle speed and constant volume of condenser, we see the upper to the value of the friction coefficient increase.
Renyus' works present that computations of a friction coefficient in kinematic pairs were made with simplified method.
High-friction values on wet runway surfaces: friction coefficient > 0.
From the forward slip S value one can calculate the value of average friction coefficient [mu] for a rolling pass using the following equation system proposed by Tselikov:(7)
While the values of the skin friction coefficient and the local Nusselt number were presented in tables, for various values of the pertinent parameters.
It appears that this faster-moving ice seen on Iapetus has a lower friction coefficient than that of slow-moving ice measured in Earth-bound laboratories.
At slow slip rates, the friction coefficient of rocks ranges from 0.
According to a statement by the Interstate Aviation Committee released on Monday, the runway at Vnukovo, Moscow's third-busiest airport, was cleaned 1 hour 20 minutes before the crash, and the friction coefficient was checked again 15 minutes after the incident.
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