What Dark Magic Makes This Weird Yo-Yo Work?

What Dark Magic Makes This Weird Yo-Yo Work?

Yo-yo tricks are already a miracle of physics. But Ben Conde specialises in a type of yo-yo with an unattached string called a diabolo, and does things that defy all logic. There’s one sneaky feature that makes these contraptions work.

Hidden between the halves of his yo-yo are tiny silicone friction pads. These — combined with high rotational speed — grab onto the string in midair and give it just enough of a tug to let it wrap back around the core. Thusly snagged, the friction increases exponentially, and the yo-yo flies back. It’s a neat trick of physics, but it still makes it look like Conde made a deal with the devil.

Unfortunately, there’s no fancy science or belt friction equation that explains why Conde is so much better at yo-yo tricks than most people. His secret is very boring hard work and practise.

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