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DENJIRO: Today, I'm going to introduce a way to climb up high using rope. We will be using this rope. Without further ado, let's get started!
BOY: Wow, that's amazing!
DENJIRO: He was able to climb up. This thick red rope is hung from up high and is connected to his body. The blue rope is tied to the red rope and is also connected to his body. Let's see what happens when he suspends himself on the blue rope. The friction at the knot increased, and he was able to easily dangle from the rope. There is another blue rope by his foot, and it is tied to the red rope in the same fashion.
First, he puts his foot on this blue rope and stands on it. Now, when you look at the blue rope connected to his body, it is not supporting any of his weight. Therefore, he can easily move the knot upward. Once he moves it up, he can hang from the blue rope. Next, he takes the blue rope on the bottom that he put his foot on and moves it up. He puts his foot on that rope and pulls himself up again. Once again, he moves up the knot of the top rope. He repeats these steps to climb up.
NARRATOR: Let's look at how to tie the rope that supports your body weight. Prepare a rope that is looped and wrap the red rope with it multiple times. That's all! When force is applied, the friction of the knot causes the rope to stay in place. However, when force is not applied, you can freely move the knot around.
DENJIRO: I hope energy will bring you all happiness. Our magic word is "Happy Energy!"