So far we've seen that chaos stems from nearby paths diverging over time. A circle in the middle of a table will always cause nearby paths to diverge and hence will makes the system chaotic.

The circle in the middle is given by the equation \(x^2+y^2=1.\) You start two (infinitesimally small) billiard balls at \(x=\pm \epsilon,y=-2\) with a velocity purely in the positive y-direction. \(\epsilon\) can be taken to be very small.

What is the ratio of the distance apart the disks are after the 25th time they bounce off the side of the table to their distance after the 5th time they bounce off the side of the table? You may assume \(N \gg 1\), but \(N\epsilon \ll 1\) m.

This problem is part of David's Complete And Utter Chaos set.

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