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At a macroscopic level, concepts such as top spin, back spin and rolling arecommonly used to describe the collision of balls and surfaces. Each term refersto an aspect of the coupling of rotational motion during the collision of aspherical particle with a planar surface. In this paper we explore themechanisms of energy transfer involving the collision of a rotating sphere anda surface using a model of frictional interactions developed for granularmaterial. We present explicit analytical treatments for the scattering andderive expressions for two important limiting classes: energy conservingcollisions and collisions subject to rapid transverse dissipation.

Translational-Rotational Coupling during the Scattering of a Frictional Sphere from a Flat Surface