An experimental study of the exponents in the power-law behaviors of rolling disks

概要

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原著論文The dependence of the exponents in the power-law behavior of a rolling disk on its mass and on its aspect ratio, which is defined as the ratio of the diameter to the thickness of the disk, is experimentally studied with the help of a high-speed video system. The exponents overall do not depend so much either on the mass or on the aspect ratio of the disk. However, for relatively thick disks whose aspect ratios are smaller than 5, we find a tendency for the magnitudes of the exponents both of the inclinations angle and of the precession rate to increase as the aspect ratio increases, which means a thicker disk halts more abruptly than a thinner one. These results suggest that the air viscosity does not essentially contribute to the energy dissipation.