How Does Stickiness Influence Static Friction?

[LLT71]

is "stickyness" part of the static friction? is it already integrated in coefficient of static friction μ or there is some special case where you put "coefficient of stickyness" in formula μ*N when things get sticky? I imagine peace of tape on some flat, relatively smooth surface. you have to pull it with relatively high amount of force in order to set it in linear motion. I suppouse area of that peace of tape also has some significance by means larger the peace of tape is larger the static friction would be?

 

[maughanster]

is "stickyness" part of the static friction? is it already integrated in coefficient of static friction μ or there is some special case where you put "coefficient of stickyness" in formula μ*N when things get sticky? I imagine peace of tape on some flat, relatively smooth surface. you have to pull it with relatively high amount of force in order to set it in linear motion. I suppouse area of that peace of tape also has some significance by means larger the peace of tape is larger the static friction would be?

I believe that you could just increase the coefficients of friction (static or otherwise) to compensate for the "stickyness". I have not yet run into coefficients of stickyness in my studies. Just coefficients of friction. Are you working on anything specific, or just curious.

 

[A.T.]

is "stickyness" part of the static friction? is it already integrated in coefficient of static friction μ or there is some special case where you put "coefficient of stickyness" in formula μ*N when things get sticky?

That simple model doesn't really apply to adhesive tape, which can stick even when N=0 or even N<0.

 

[LLT71]

I believe that you could just increase the coefficients of friction (static or otherwise) to compensate for the "stickyness". I have not yet run into coefficients of stickyness in my studies. Just coefficients of friction. Are you working on anything specific, or just curious.

just curious :D I had the same idea about compensation for example that miu can be much grater than one.

That simple model doesn't really apply to adhesive tape, which can stick even when N=0 or even N<0.

could you explain me a bit about that N=0 and N<0 cases, I am just curious, and how N can be less than zero? thanks!

 

[A.T.]

could you explain me a bit about that N=0 and N<0 cases, I am just curious, and how N can be less than zero?

Do you understand what N is?

https://en.wikipedia.org/wiki/Friction#Normal_force

 

[LLT71]

Do you understand what N is?

https://en.wikipedia.org/wiki/Friction#Normal_force

yes and no... cause I don't get in which scenario is N<0 :S

 

[A.T.]

yes and no... cause I don't get in which scenario is N<0 :S

Did you read the link I gave you?

"The normal force is defined as the net force compressing two parallel surfaces together;..."

What does negative compression mean?

 

[LLT71]

Did you read the link I gave you?

"The normal force is defined as the net force compressing two parallel surfaces together;..."

What does negative compression mean?

sorry I have very poor physics knowledge

 

[A.T.]

sorry I have very poor physics knowledge

Do you understand what "compressing" or "pressing" means? What is the opposite of that?