Knuckleball Graphic (IMAGE)
Caption
The baseball in this illustration of a knuckleball pitch is moving to the left, leaving a wake trailing behind (i.e., to the right). The blue-colored air is rotating clockwise; the red air is rotating counterclockwise. The drag on the ball depends on the wake size, which depends in turn on the distance between the uppermost blue and lowermost red points. The upward wake means the ball is being pushed downward.
Credit
Sakib and Smith
Usage Restrictions
This image may be used by reporters only with appropriate credit.
License
Licensed content