A bouncy ball or rubber ball is a spherical toy ball, usually fairly small, made of elastic material which allows it to bounce against hard surfaces. When thrown against or dropped above a hard surface, bouncy balls retain their momentum and much of their kinetic energy after impact.
A bouncy ball or rubber ball is a spherical toy ball, usually fairly small, made of elastic material which allows it to bounce against hard surfaces. When thrown against or dropped above a hard surface, bouncy balls retain their momentum and much of their kinetic energy after impact.
Source: Wikipedia "Bouncy ball" · CC BY-SA 4.0
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