Talk:Lever rule

Alloy is used incorrectly un this document as the lever arm rule also applies to non alloys.73.143.118.18 (talk) 02:45, 4 May 2015 (UTC) NMI

Why can people not simplify things? Seriously. Use full words, not letters, and give the rule properly, so it can be learned and understood.

Unknown variables
L and x is not defined. 77.212.171.42 (talk) 17:33, 22 June 2010 (UTC)


 * I don't know what those variables are, however I completely reworked the article. Let me know if something still isn't clear. Wizard191 (talk) 01:14, 23 June 2010 (UTC)

It would an improvement to make sure that the same variables are used throughout the whole article. I feel like the same quantity is described by more than one variable at the moment. For example, how does W_alpha relate to W_l. A helpful thing to do might be to see which text book explanation is clearest and follow this model. Having said this, I really ought to do it. Hopefully this is a helpful comment none the less. Chogg (talk) 11:45, 26 May 2013 (UTC)

This article is amazingly poorly written. — Preceding unsigned comment added by 2001:4830:2446:60:3D09:483D:9B30:7864 (talk) 02:29, 15 December 2015 (UTC)

Bad Derivation
There's something wrong with the algebra, or with the description of the variables in the Derivation section. If a = b (mix is 50/50?) then $$W_\alpha / W_{TOT} $$ is infinite. Unless c also = b, therefore a = b = c. Can't be.

Shouldn't c = a + b? But instead we have $$W_{TOT} = W_\alpha + W_\beta$$   Instead of $$W_{\alpha,B} = aW_\alpha$$, shouldn't $$W_{\alpha,B} = aW_{TOT}$$ ?

FWIW, you can use percentages 0% - 100% as it does, or fractions 0.0 - 1.0, it's all the same as the 100 factors out. Also if you use a numerical example, as you derive as well as in the description, it might be clear as well as correct. Like say a = 5%, b = 5%, W_TOT = 100kg. Plug those in and see if the derivation makes sense. OsamaBinLogin (talk) 20:35, 7 August 2016 (UTC)