# Anomalous behavior of the coefficient of normal restitution in oblique impact.

@article{Kuninaka2004AnomalousBO, title={Anomalous behavior of the coefficient of normal restitution in oblique impact.}, author={Hiroto Kuninaka and Hisao Hayakawa}, journal={Physical review letters}, year={2004}, volume={93 15}, pages={ 154301 } }

The coefficient of normal restitution in an oblique impact is theoretically studied. Using a two-dimensional lattice model for an elastic disk and an elastic wall, we demonstrate that the coefficient of normal restitution can exceed unity and has a peak against the incident angle in our simulation. We also explain this behavior based upon a phenomenological theory.

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