How to study the static friction coefficent

[elabed haidar]

i need to know how to study the static friction coefficient like what happens if it exceeds its limit what happens why the least value of static coefficient is static

 

[Femme_physics]

Hey Elabed,

The static coefficient is constant, it doesn't change. To better illustrate, you can see a list of static coefficients here:

http://www.carbidedepot.com/formulas-frictioncoefficient.htm

(I may have misunderstood your question. Otherwise, I hope that helps.)

 

[kgbgru]

Once you exceed the force of static friction can resist then you get kinetic friction. That is the friction on a moving object. Its coefficient is almost always less than static friction.

 

[Femme_physics]

Wait, kgbgru, are you telling me some kinetic coefficients can be more than their respective static ones?

 

[kgbgru]

I have never seen one that is greater but some are quite close.

 

[Femme_physics]

That makes more sense. :)

 

[ashishsinghal]

static friction tries to remove the effect of any force acting along the surface.
its value changes according to the need. if it cannot remove its effect then kinetic friction acts.
actually the force changes