Original subtitles

Hey, hello, guys. My name is Mr. Yaro

and I have a question for you.

Do you remember how many years ago you learned how to walk and after a few years,

maybe 5 to 10 years, you learned how to ride a bicycle?

So, in both of these cases, you learned how to keep balance.

Even now, we can try we can stand on one leg for a one or two minutes.

It will be not so easy...

So, why do we need to keep balance?

Because we can fall down.

And do you know why it's happened?

Because we have a fundamental force named GRAVITY. And gravity it's a force

which pull everything into the center of the planet.

What is the balance? Balance is the same weight in the opposite sides.

For example, I can put this wood stick on my finger in the middle.

OK, so right now, this stick is balanced.

But if I want to keep the stick, not in the middle? For example, here...

What exactly I can use? I can use the same knowledge!

I can have the same weight in the opposite sides.

And I hope this is nut can help me.

Why do we need this knowledge about balance?

How we can use it? How we can apply it in the future?

So, this knowledge about balance we can use when we want to build a building.

For example, skyscrapers. For skyscrapers we need to mention about two things.

First, about balance.

And second, it's about strong construction.

And all construction or all tall buildings can be made from simple shapes.

And here I have a two shapes.

I have a square

and a triangle.

Which one is more stronger, do you know?

So, let's make one experiment and let's test.

These two shapes.

Let's see what's happening.

OK, so what do we have here?

We have two shapes,

triangle-based and square-based. And what's happening if we will shake our table?

So, triangle! This is our friend.

If we want to make strong shape and strong

construction, we must use triangles. Not only in tall buildings,

it can be used in the plane, in the car

and everywhere, where we need a really strong connection.

So guys, now you know about triangles.

See you! Bye bye!