The Physics of baseball pitching:
http://farside.ph.utexas.edu/teaching/329/...res/node69.html
As is well-known to baseball fans, there are a surprising variety of different pitches. ``Sliders'' deviate sideways through the air. ``Curveballs'' deviate sideways, but also dip unusually rapidly. Conversely, ``fastballs'' dip unusually slowly. Finally, the mysterious ``knuckleball'' can weave from side to side as it moves towards the hitter. How is all this bizarre behaviour possible? Let us investigate.