How Does Stickiness Influence Static Friction?

  • Context: Undergrad 
  • Thread starter Thread starter LLT71
  • Start date Start date
  • Tags Tags
    Friction
Click For Summary
SUMMARY

The discussion centers on the relationship between stickiness and static friction, specifically whether stickiness is integrated into the coefficient of static friction (μ) or if a separate coefficient of stickiness should be considered. Participants agree that traditional models of friction do not adequately account for adhesive materials like tape, which can exhibit significant stickiness even under conditions where the normal force (N) is zero or negative. The conversation highlights the complexity of friction in adhesive contexts, suggesting that coefficients of friction may need to be adjusted to account for stickiness.

PREREQUISITES
  • Understanding of static friction and its coefficient (μ)
  • Basic knowledge of normal force (N) in physics
  • Familiarity with adhesive properties of materials
  • Concept of force and its application in friction scenarios
NEXT STEPS
  • Research the role of adhesive forces in friction, particularly in materials like tape
  • Study the implications of negative normal force in friction scenarios
  • Explore advanced friction models that incorporate stickiness
  • Investigate experimental methods to measure coefficients of friction for adhesive materials
USEFUL FOR

Physics students, materials scientists, and engineers interested in the mechanics of friction and adhesion, particularly in applications involving adhesive materials.

LLT71
Messages
73
Reaction score
5
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?
 
Physics news on Phys.org
LLT71 said:
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.
 
LLT71 said:
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.
 
  • Like
Likes   Reactions: CWatters
maughanster said:
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.

A.T. said:
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!
 
LLT71 said:
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?
 
A.T. said:
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
 
LLT71 said:
sorry I have very poor physics knowledge
Do you understand what "compressing" or "pressing" means? What is the opposite of that?
 

Similar threads

Undergrad Static rotational friction: does diameter matter?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad I would like a better understanding of friction and hysteresis
  • · Replies 5 ·
Replies
5
Views
2K
High School Rolling Motion Test: Take the Challenge and Justify Your Answers
  • · Replies 37 ·
2
Replies
37
Views
4K
High School How Does a Man Accelerate While Climbing a Rope?
  • · Replies 34 ·
2
Replies
34
Views
4K
Undergrad Mass is independent of tendency to break static friction?
  • · Replies 6 ·
Replies
6
Views
4K
High School Questions about momentum and force as well as normal force/friction
  • · Replies 35 ·
2
Replies
35
Views
4K
Undergrad What is Friction? Definition & Explanation
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Impact of speed on the coefficient of rolling friction
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Kindly rectify my notion of sliding friction
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Friction and Relation of Coefficient of Friction to Smoothness
  • · Replies 3 ·
Replies
3
Views
3K