Talk:Coefficient of friction

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[edit] Confusion

This article might reinforce the common confusion that the normal force is always determined only by the weight of an object. All forces on an object must be considered.—Preceding unsigned comment added by Starwed (talk • contribs)

  • Are you sure? On the bottom it says that it may include other forces. --Explodicle 13:46, 25 August 2006 (UTC)

[edit] Free body diagram

I don't like the diagram (Image:Free body diagram.png). The forces should all pass through a single point. The way it's drawn, there's a net torque on the body, which would cause an angular acceleration. Also, in the diagram, the normal force is labelled N, while in the caption, it's labelled R. Rracecarr 15:12, 12 February 2007 (UTC)

But since it's modelled as a particle don't all forces have to be through a single point? So it doesn't really matter where they're drawn from. -Grimboy (talk) 12:57, 18 January 2008 (UTC)
It's easy to draw the diagram without the torque, so why not do it? Moot point, really, because for many months the version in the article has been correct.Rracecarr (talk) 13:09, 18 January 2008 (UTC)

I've changed the free body force diagram so the forces are from the center of mass, which is how forces are usually represented in this situation (inclined planes). Clark (talk) 08:23, 29 March 2008 (UTC)

[edit] Duplicates duplicates

A lot of stuff here duplicates what's on friction. And within this article, the same info is presented twice: once at the top, and again under Static & Kinetic friction. Thoughts on ruthless deletion? Querl 06:37, 19 February 2007 (UTC)

Clarifying - I mean ruthless deletion of redundant content, not of the article itself. Querl 06:41, 19 February 2007 (UTC)

i hate this webite so i am going to tell you this was on my 12th grade report and i got an a+ so take this advice this friction is the controller and accelorator of the dependable so i am demonstraring that everyone makes mistakes everyone gets that way well bak to this the accelorator of the surfaces of contract —Preceding unsigned comment added by 76.173.143.73 (talk) 05:05, 15 November 2007 (UTC)

[edit] Values?

Why are there no values listed for the coefficient of friction? If it is a constant, wouldn't it be helpful to list some values? - Katami (talk) 01:35, 23 January 2008 (UTC)

[edit] German wikipedia

If you take a look at the German version of the article, you'll see in the "Häufige Irrtümer" section that the "µ is always lesser than 1" myth is debunked. It would be interesting to see something similar here. 89.201.132.205 (talk) 14:42, 27 March 2008 (UTC)

[edit] Frequent Mistakes

This does not look like an improvement: "having a µ > 1 merely implies that the minimum force required to move an object along the plane along which the friction acts, is greater than the reaction force of the plane on the object."

The repeated "along" seems awkward, and which component of the reaction force is meant? Not all of it, right? -AndrewDressel (talk) 02:39, 28 May 2008 (UTC)