Frictional coupling between sliding and spinning motion

被引:51
作者
Farkas, Z [1 ]
Bartels, G
Unger, T
Wolf, DE
机构
[1] Univ Duisburg Essen, Inst Phys, D-47048 Duisburg, Germany
[2] Budapest Univ Technol & Econ, Dept Theoret Phys, H-1111 Budapest, Hungary
关键词
D O I
10.1103/PhysRevLett.90.248302
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The tangential motion at the contact of two solid objects is studied. It consists of a sliding and a spinning degree of freedom (no rolling). We show that the friction force and torque are inherently coupled. As a simple test system, a sliding and spinning disk on a horizontal flat surface is considered. We calculate, and also measure, how the disk slows down and find that it always stops its sliding and spinning motion at the same moment. We discuss the impact of this coupling between friction force and torque on the physics of granular materials.
引用
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页数:4
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