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Hey, hello, guys.
My name is Mr. Yaro
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and I have a question for you.
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Do you remember how many years ago you
learned how to walk and after a few years,
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maybe 5 to 10 years,
you learned how to ride a bicycle?
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So, in both of these cases,
you learned how to keep balance.
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Even now, we can try - we can stand
on one leg for a one or two minutes.
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It will be not so easy...
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So, why do we need to keep balance?
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Because we can fall down.
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And do you know why it's happened?
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Because we have a fundamental force
named GRAVITY. And gravity it's a force
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which pull everything into the center of the planet.
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What is the balance? Balance is the same
weight in the opposite sides.
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For example, I can put this wood
stick on my finger in the middle.
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OK, so right now,
this stick is balanced.
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But if I want to keep the stick,
not in the middle? For example, here...
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What exactly I can use?
I can use the same knowledge!
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I can have the same weight
in the opposite sides.
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And I hope this nut can help me.
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Why do we need this knowledge about balance?
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How we can use it?
How we can apply it in the future?
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So, this knowledge about balance we can use
when we want to build a building.
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For example, skyscrapers. For skyscrapers
we need to mention about two things.
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First, about balance.
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And second, it's about strong construction.
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And all construction or all tall buildings
can be made from simple shapes.
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And here I have a two shapes.
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I have a square
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and a triangle.
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Which one is more stronger, do you know?
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So, let's make one
experiment and let's test.
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These two shapes.
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Let's see what's happening.
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OK, so what do we have here?
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We have two shapes,
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triangle-based and square-based. And what's
happening if we will shake our table?
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So, triangle!
This is our friend.
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If we want to make strong shape and strong
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construction, we must use triangles.
Not only in tall buildings,
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it can be used in the plane, in the car
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and everywhere, where we need
a really strong connection.
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So guys, now you know about triangles.
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See you! Bye bye!
3649
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