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DENJIRO: Today we're going to talk about boomerangs. Take a look. You probably think that a boomerang is something that flies and comes back to you, as you just saw. Actually, it was originally a weapon that you threw straight at your prey. Here's what they looked like back in the day. It's also called a "kylie." Let me throw it. You saw that it flew straight.
I also went outside to throw it since I can't throw it far inside the studio.
So how does it fly so far in a straight line? Let's take a close look at this boomerang. The bottom is flat, while the top is curved. It's in the shape of a wing. This creates a force called "lift" that makes the boomerang float.
Spinning the boomerang also creates the gyroscopic effect and stabilizes it. This is the same principle behind a flying disc. This is how a boomerang is able to fly far and straight.
Boomerangs are marked by their curved shape, but there's a reason for this. Let me show you by throwing this straight piece of wood.
It flipped over midway, spun in a wobbly manner, and didn't fly very far. The curve in a boomerang allows for it to spin in a stable manner and fly far. There's even a record of a giant 180-cm boomerang. Will it actually fly? Let's find out!
I hope energy will bring you all happiness. Our magic word is "Happy Energy!"