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oldguy53
Feb 12, 2006, 6:06 PM
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I don't want to know about mass, gravity and lifting, just a a quick convert factor into app. lbs. of strength. thanks
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inthewoods78
Feb 12, 2006, 6:14 PM
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1 kilonewton = 224.808943 pounds force
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scrapedape
Feb 12, 2006, 6:22 PM
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In other words, a newton is 0.22 lbs.
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euroford
Feb 12, 2006, 6:22 PM
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they are not cookies, they are fruit and cake.
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woj12_16
Feb 12, 2006, 6:58 PM
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A newton is unit of force, metric style. There's an equation out there, developed by Sir Isaac Newton, which says force is equal to mass times acceleration. So if you weighed 200 pounds, that means your mass is about 90 kilograms. Acceleration is 9.81 meters/second squared. That means that force you'll create falling through the air is less than 900 newtons, so your caribeaner thats rated for 25000 newtons would surely hold you. And that's pretty much all you need to know.
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sungam
Feb 12, 2006, 7:29 PM
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F=ma
1 newton of force (F) is the force required to accelerate one kilonewton (m) at 1metre per second per second/ ms^-2 (a)
that is to say, as you fall, times your weight by 9.81, double that (due to tthe force from your anchor on the other end of the rope) and you have the resultant force applied to the piece of pro. however, by using the equation
Ft=Mv-Mu as you increase the time of the exchange of momentum(mv-mu), by use of screamers, dynamic belaying, rope stretch, etc, the force applied is reduced.
-Magnus
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jsoper
Feb 12, 2006, 7:30 PM
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Newton= kg * m/(s^2)
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sactownclimber
Feb 12, 2006, 9:08 PM
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In reply to: . . . Acceleration is 9.81 meters/second squared. That means that force you'll create falling through the air is less than 900 newtons, so your caribeaner thats rated for 25000 newtons would surely hold you. And that's pretty much all you need to know.
Ummm . . . no. My physics is pretty rusty by I know you can't just multiply 90 kg by 9.8 and says that's the force.
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hammerhead
Feb 12, 2006, 9:45 PM
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I thought it was the force necessary to move a kilo one meter in one second..................
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sungam
Feb 12, 2006, 10:00 PM
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it's the force to accelerate 1 kg at 1ms^-2
so in 1 s it would be going 1ms^-1
-Magnus
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greenketch
Feb 12, 2006, 10:06 PM
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In reply to: I don't want to know about mass, gravity and lifting, just a a quick convert factor into app. lbs. of strength. thanks
The short answer is that a Kn is 224 lbs.
The long answer is that they are not the same. One cannot say that I don't want to know about baking I just want to know how many brownies in a piece of cake. A kilo newton is a measure of force applied, a lb is a measure of mass. An item such as a biner can hold a certain amount of mass in a static condition (10 Kn is roughly 2250 lbs) but a weight in motion would break that same biner (a 1000lb weight moving at 30 miles per hour from a short fall).
It would be good to understand the differences and as you progress as a climber one should understand just how those changes occur.
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dutyje
Feb 12, 2006, 10:27 PM
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The Newton (aka Fig Roll in Europe) is a soft, cake-like cookie (biscuit) filled with fig jam. A patented and trademarked product of Nabisco, Fig Newtons originated in the United States and have since spread across the world. They have traditionally been rather unique compared to similar products offered by competitors, but in recent times rivals have arisen, such as Wal-Mart's "Fig Bars", which are sold under its Great Value brand.
The Fig Newton was created in 1891 by Charles M. Roser of the Kennedy Biscuit Company, a Massachusetts-based bakery. The company named many of their products after surrounding communities. The Fig Newton was named after nearby Newton, Massachusetts. It was first simply called the Newton, but the name was changed to Fig Newton in 1898.
The Kennedy Biscuit Company merged with other regional bakeries in 1898 to form the National Biscuit Company, which later became Nabisco. The cookie is now produced by Nabisco.
The machine that makes the cookie consists of a funnel within a funnel. The inner funnel contains the filling, and the outer funnel contains the dough. The machine expresses a long length of filled cookie, which is then baked, cut into smaller pieces, and packaged.
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kubi
Feb 12, 2006, 11:41 PM
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In reply to: In reply to: I don't want to know about mass, gravity and lifting, just a a quick convert factor into app. lbs. of strength. thanks The short answer is that a Kn is 224 lbs. The long answer is that they are not the same. One cannot say that I don't want to know about baking I just want to know how many brownies in a piece of cake. A kilo newton is a measure of force applied, a lb is a measure of mass. An item such as a biner can hold a certain amount of mass in a static condition (10 Kn is roughly 2250 lbs) but a weight in motion would break that same biner (a 1000lb weight moving at 30 miles per hour from a short fall). It would be good to understand the differences and as you progress as a climber one should understand just how those changes occur.
close, but not quite. Whenever anyone says "pounds" they mean "pounds force" There is a such thing as "pounds mass" but nobody in their right mind would use that unit, it's just too confusing. Use slugs intead. 1 slug is equal to 32.2 pounds mass.
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curt
Feb 13, 2006, 12:26 AM
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In reply to: A newton is unit of force, metric style. There's an equation out there, developed by Sir Isaac Newton, which says force is equal to mass times acceleration. So if you weighed 200 pounds, that means your mass is about 90 kilograms. Acceleration is 9.81 meters/second squared. That means that force you'll create falling through the air is less than 900 newtons, so your caribeaner thats rated for 25000 newtons would surely hold you. And that's pretty much all you need to know.
Here's a thought. If you don't have any idea of what you're talikng about, perhaps you should refrain from posting anything. :wink:
Here's a clue as to where you went wrong: The acceleration of a falling climber, due to gravity "a" has nothing to do with the correct "a" used in the F=ma equation to calculate the force on the falling climber and/or gear, when his fall is arrested.
Curt
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daithi
Feb 13, 2006, 12:39 AM
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In reply to: What is a Newton?
A proper unit for measuring force as opposed to archaic imperial units that even the Brits themselves got rid of (well almost!). Interestingly, the US was charter member of the treaty that was signed in 1875 agreeing on the Système International d'Unités (SI units).
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daithi
Feb 13, 2006, 12:43 AM
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In reply to: So if you weighed 200 pounds, that means your mass is about 90 kilograms. Acceleration is 9.81 meters/second squared. That means that force you'll create falling through the air is less than 900 newtons, so your caribeaner thats rated for 25000 newtons would surely hold you.
Not quite! mg is the force exerted on as you are falling, causing you to accelerate. Here's the problem though, you need the stop at the end of this fall as the rope catches you (or at least hopefully it does). The deceleration force you feel at the end of the fall, as the rope stops you, is greater than mg.
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greenketch
Feb 13, 2006, 1:03 AM
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In reply to: close, but not quite. Whenever anyone says "pounds" they mean "pounds force" There is a such thing as "pounds mass" but nobody in their right mind would use that unit, it's just too confusing. Use slugs intead. 1 slug is equal to 32.2 pounds mass.
:lol: :lol: :lol: You are exactly right. I just could not quite bring myself considering the question to tell the nice person that we were going to introduce slugs into the equation. Like maybe I should use a simple term to reinforce that the force was different from the force.
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kubi
Feb 13, 2006, 1:07 AM
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In reply to: In reply to: close, but not quite. Whenever anyone says "pounds" they mean "pounds force" There is a such thing as "pounds mass" but nobody in their right mind would use that unit, it's just too confusing. Use slugs intead. 1 slug is equal to 32.2 pounds mass. :lol: :lol: :lol: You are exactly right. I just could not quite bring myself considering the question to tell the nice person that we were going to introduce slugs into the equation. Like maybe I should use a simple term to reinforce that the force was different from the force.
from this point onward I'm going to start requesting that people quote gear mass in slugs. AMERICA, FUCK YEAH!
edited to change strength to mass. im no so smrt
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fivesix
Feb 13, 2006, 1:19 AM
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quite frankly i wouldnt trust majority of you to tell me what a newton is!
first of all because most of you dont work with the metric system, and second, i dont think that many of you understand how and where and why forces are applied in the unorthodox world of climbing.
http://en.petzl.com/...nseil=56&Activite=14
this may prove to be helpful to begin understanding where and how forces are made. its designed for lead climbing...
cheers
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superbum
Feb 13, 2006, 1:22 AM
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In reply to: they are not cookies, they are fruit and cake.
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
also known as: :lol:
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col
Feb 13, 2006, 1:34 AM
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A more relevent question for the majority of the world may be what is a Pound equal to in kN?
and what is a cubit?
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squierbypetzl
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Feb 13, 2006, 1:38 AM
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In reply to: In reply to: . . . Acceleration is 9.81 meters/second squared. That means that force you'll create falling through the air is less than 900 newtons, so your caribeaner thats rated for 25000 newtons would surely hold you. And that's pretty much all you need to know. Ummm . . . no. My physics is pretty rusty by I know you can't just multiply 90 kg by 9.8 and says that's the force.
Ummm . . . yeah. My physics is pretty rusty too, but I do remember that:
F= force = ?
m= mass = 90kilograms
a= acceleration = distance/time squared = 9.81 meters/second squared at sea level
Therefore, F=m*a = 90 x 9.81.
That´s force.
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