A Yoyo Can Spin as Fast as a Formula 1 Engine

MACHINES: HOW THEY WORK
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Ten steel balls roll between the inner and outer rings within a yoyo's shell. They work together to reduce friction, allowing the yoyo to keep spinning at the bottom of the string for over 10 minutes.

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Видео A Yoyo Can Spin as Fast as a Formula 1 Engine канала Science Channel