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DENJIRO: Today, I’ll show you an interesting experiment using this ball chain.
Since it’s a chain, you can see that it is wobbly like this.
I’m going to attach this chain to this machine here. Let’s turn it on.
As you can see, the disc spins at a very high speed.
Let’s attach the ball chain to this disc. Then we’ll remove the chain while the disc is spinning. Let’s see what happens.
BOY: The chain rolled across the floor!
DENJIRO: It moved very quickly. If you watch in slow motion, you can see that the chain is taut, and it spins like a solid wheel.
Why does this happen?
Have you ever held hands with some people and spun around?
When you spin, each person is pulled outside, and your arms get stretched out.
The same phenomenon happened with the chain.
The faster it spins, the tauter the wobbly chain becomes, allowing it to become hard and spin like a rubber tire.
NARRATOR: What happens if we spin it at a slower speed?
The force that pulls the chain outward is weakened, so the chain is not taut. Therefore, it loses its shape.
DENJIRO: Now, let’s see what happens when the spinning chain runs into an obstacle like this.
BOY: The chain jumped!
DENJIRO: The chain jumped high into the air while keeping its round shape.
Let’s see the moment it hits the obstacle in slow motion. You can see that the shape of the spinning chain is greatly distorted.
When the shape is distorted after running into the obstacle, the force of the rotation makes it jump high and return to its original round shape.
As you can see, spinning a chain at high speed allows it to keep its circular shape.
I hope energy will bring you all happiness. Our magic word is "Happy Energy!”