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These
are three pictures showing a racquetball, initially moving to the
right, colliding with a wall on the right. The racquetball's shape is far from round, since it
is easily deformed during the collision. Most noticeable
are the ripples and depressions that form on the surface.
About
a third of the way through the collision, a ripple has formed on the
ball. For a very brief time, a small dimple also forms on the
trailing side of the ball, as seen in the first image. This
dimple has disappeared a few ten thousandths of a second later.
The protrusion in the center of the ball disappears as it moves
rightward, while the outer walls of the ball begin moving leftward.
For a
sequence of images taken at 0.00025 s intervals,
click
here.
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