Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
1997-08-19
Physics
Condensed Matter
Soft Condensed Matter
8 pages RevTeX, 12 Postscript figures
Scientific paper
10.1103/PhysRevE.57.4743
We report an experimental, numerical and theoretical study of the motion of a ball on a rough inclined surface. The control parameters are $D$, the diameter of the ball, $\theta$, the inclination angle of the rough surface and $E_{ki}$, the initial kinetic energy. When the angle of inclination is larger than some critical value, $\theta>\theta_{T}$, the ball moves at a constant average velocity which is independent of the initial conditions. For an angle $\theta < \theta_{T}$, the balls are trapped after moving a certain distance. The dependence of the travelled distances on $E_{ki}$, $D$ and $\theta$. is analysed. The existence of two kinds of mechanisms of dissipation is thus brought to light. We find that for high initial velocities the friction force is constant. As the velocity decreases below a certain threshold the friction becomes viscous.
Aguirre Maria Alejandra
Batrouni Ghassan George
Bideau Daniel
Calvo Adriana
Dippel S.
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