Fascinating mathematics news:
The new equation takes into account the stiffness of hairs, the effects of gravity and the presence of random curliness or waviness.
The Ponytail Shape Equation represents the first scientific understanding of the distribution of hairs in a ponytail, say the researchers.
It provides new understanding of how a bundle is swollen by the outward pressure which arises from collisions between the component hairs.
Together with a new mathematical quantity known as the Rapunzel Number, the equation can – they say – be used to predict the shape of any ponytail.
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