Squash and stretch

[[File:Squash and Stretch.svg|thumb|right|300px|Illustration of the "squash and stretch"-principle:<br />Example A shows a ball bouncing with a rigid, non-dynamic movement.

In example B the ball is "squashed" at impact, and "stretched" during fall and rebound]]

Squash and stretch is the phrase used to describe "by far the most important"

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