The Friction Oscillator

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The friction oscillator mechanism consists of a rod moving horizontally over two disks separated by a distance ; the disks spin in opposite directions, providing a net kinetic friction with effective coefficient . Kinetic friction (shown in green) is proportional to the weight . The rod moves a distance because the components of normal forces (in brown) are changing.

Contributed by: Enrique Zeleny (July 2013)
Open content licensed under CC BY-NC-SA



The normal forces are

, ,

and the frictional forces are

, .


[1] D. Russell. The Friction Oscillator [Video]. (Jul 23, 2013)

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