Probability and dynamics in the toss of a non-bouncing thick coin

Details Probability and dynamics in the toss of a non-bouncing thick coin Probability and dynamics in the toss of a non-bouncing thick coin

2010-08-26

arxiv.org/abs/1008.4559v3

Physics

Classical Physics

Scientific paper

When a thick cylindrical coin is tossed in the air and lands without bouncing on an inelastic substrate, it ends up on its face or its side. We account for the rigid body dynamics of spin and precession and calculate the probability distribution of heads, tails, and sides for a thick coin as a function of its dimensions and the distribution of its initial conditions. Our theory yields a simple expression for the aspect ratio of homogeneous coins with a prescribed frequency of heads/tails compared to sides, which we validate by tossing experiments using coins of different aspect ratios.

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