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... the standard math text treatment of pool table physics ...
... claims that the standard math text treatment of pool table
physics is wrong.
The standard math text treatment uses a mirror over the
edge of the bumper and has the player aim at the virtual image.
However this is wrong. The mirror must be moved in by about
the radius of the ball.
Of course this is assuming an elastic
hard collision model with no friction.
I suspect this has already been discussed or is written up
in one of the physics journals or textbooks.
Would anyone have a source for this?