Spin on a ball.

[Mike Cherepov]

--
If a (tennis) ball flies through the air while rotating around
the vertical axis (view from above):

O ---->speed
<-spin

it would start curving to the right (relative to the direction
of movement).
At least that's what I've observed 1000 times.
I was trying to explain it to myself (higher-pressure area in front =>
more friction against the air in front) , but that scheme
suggests quite the opposite - it should be curving to the left!!!

This is very disturbing. Does anybody have a better theory (come to
think about it, anything would be a better theory)?
Mike Cherepov
--
Mike Cherepov