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Belaying

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Sci Files segment describing how belaying tools and techniques provide a safe means of vertical ascent.

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Hi. Are you Mr. Harding? 00:00:00
Yes, that's right. You must be one of the treehouse detectives. 00:00:04
Dr. D tells me you need to learn more about safety. 00:00:07
That's right. Dr. D mentioned that you rock climb. 00:00:10
We were wondering how you make it safe. 00:00:13
Well, I can show you that right here. 00:00:15
But first we need to outfit you with the climbing harness to tie the rope into you. 00:00:16
You aren't going to pull me up, are you? 00:00:21
No, you're going to have to do the climbing yourself. 00:00:23
The rope is just simply there to keep you safe. 00:00:25
How does that work? 00:00:28
It's called belaying. 00:00:29
I tie one end of the rope into your harness, and then it goes through the eye bolt at the top, 00:00:30
and then down to me, the belayer. 00:00:36
It passes through this belay device called an ATC or figure eight. 00:00:38
If you slip and begin to fall, I simply pull on the rope like this, 00:00:42
and the friction with the ATC stops the rope. 00:00:45
Are you sure this is going to work? 00:00:48
Let me show you. 00:00:50
Climb up a few feet and then let go. 00:00:52
Okay. 00:01:00
Wow, it stopped me right away. 00:01:05
I told you it would. 00:01:07
Another important safety feature is the type of rope we're using. 00:01:09
It's called a dynamic rope because it has stretch to it. 00:01:12
That way you don't stop too suddenly. 00:01:15
You want to try some rappelling? 00:01:20
What's that? 00:01:22
Let me have my son demonstrate. 00:01:23
It looks like he used the same device that you used to belay me. 00:01:30
That's right. I have a belay attached to him to keep him safe. 00:01:34
I'll bet we could use the belay principle as a safety device for a lift chair. 00:01:37
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Idioma/s:
en
Niveles educativos:
▼ Mostrar / ocultar niveles
      • Nivel Intermedio
Autor/es:
NASA LaRC Office of Education
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
423
Fecha:
28 de mayo de 2007 - 15:32
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
01′ 47″
Relación de aspecto:
4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:
480x360 píxeles
Tamaño:
10.85 MBytes

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