Lever arm?

[Harry_L]

Hi all, i was wondering if anyone can give me a basic explanation of what a lever arm is, as i have to explain it in my coursework?

 

Any help is greatly appreciated, many thanks

 

Harry

 

 

Sent from my iPhone using Arbtalk

[David Humphries]

"The length of a structure free to move at one end in the manner of a lever, such as a branch, and the distribution of weight along that length affecting loading at the base."

 

Taken from from Phillip Wilson's really useful Arb terminology

 

Tree term definitions -

 

Worth getting hold of Claus Mattheck and Ducan Slaters work and then go out in to the woods and see it all in the flesh.

 

No better way to learn

 

 

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[Harry_L]

Thanks very much! [emoji106]

 

 

Sent from my iPhone using Arbtalk

[daltontrees]

It's a confusing term, as it sounds like it should be a thing but instead it's a distance, a number.

 

All other things being equal, the torque at the base of a lever (like a branch) is proportionate ti the length (the lever arm) of the lever. The longer the branch the more likely it is to tear at the base.

 

Officially one can't say 'what is a lever arm?' you should say 'what is lever arm?'

Edited April 24, 2017 by daltontrees

[Gary Prentice]

It's a confusing term, as it sounds like it should be a thing but instead it's a distance, a number.

 

All other things being equal, the torque at the base of a lever (like a branch) is proportionate ti the length (the lever arm) of the lever. The longer the branch the more likely it is to tear at the base.

 

Officially one can't say 'what is a lever arm?' you should say 'what is lever arm?'

 

Is there a recognised term for the stem wound resulting from the failure of the lever arm?

[David Humphries]

Is there a recognised term for the stem wound resulting from the failure of the lever arm?

 

Americans call one of these wound types, the 'ball in socket failure'

 

 

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