Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Dry Friction01:30

Dry Friction

485
Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
485
Static Friction01:18

Static Friction

931
Static friction is a force that opposes the relative motion or tendency of motion between two surfaces in contact. It plays a crucial role in our daily lives, from walking on the ground to driving a car.
For example, consider a scenario where a truck is connected to a car by a rope, ready to tow it along a road. When no external force is applied by the truck, the car remains stationary and is said to be in static equilibrium. In this case, the forces acting on the car, such as gravity and the...
931
Frictional Force01:07

Frictional Force

8.6K
When a body is in motion, it encounters resistance because the body interacts with its surroundings. This resistance is known as friction, a common yet complex force whose behavior is still not completely understood. Friction opposes relative motion between systems in contact, but also allows us to move. Friction arises in part due to the roughness of surfaces in contact. For one object to move along a surface, it must rise to where the peaks of the surface can skip along the bottom of the...
8.6K
Characteristics of Dry Friction01:21

Characteristics of Dry Friction

702
Dry friction occurs when two solid surfaces slide against each other without any lubrication or fluid present. It causes resistance when pushing objects along a surface, like a gardener pushing a wheelbarrow. The force applied to move the cart causes dry friction between the wheel and the ground.
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
702
Types of Friction Problems01:27

Types of Friction Problems

653
Friction is an essential concept in physics, engineering, and everyday life. It is the force that opposes the relative motion or tendency of such motion between two surfaces in contact. One of the most common types of friction encountered in various applications is dry friction. Dry friction problems can be broadly categorized into three types, each with unique characteristics and challenges.
The first type of dry friction problem involves situations where there is no apparent impending motion....
653
Kinetic Friction01:26

Kinetic Friction

1.0K
Consider a truck trying to pull a stationary car. As the truck exerts a force on the car, static friction is created at the point of contact between the two surfaces. This frictional force resists the car's movement and keeps it at rest. However, when the applied force by the truck surpasses the limiting static frictional force, an interesting phenomenon occurs. The frictional force at the interface reduces to a lower value, known as the kinetic frictional force. At this point, the car...
1.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A self-powered and reusable biocomputing security keypad lock system based on biofuel cells.

Chemistry (Weinheim an der Bergstrasse, Germany)·2010
Same author

Prevalence of nerve-vessel contact at cisternal segments of the oculomotor nerve in asymptomatic patients evaluated with magnetic resonance images.

Chinese medical journal·2010
Same author

Overexpression and characterization in Bacillus subtilis of a positionally nonspecific lipase from Proteus vulgaris.

Journal of industrial microbiology & biotechnology·2010
Same author

Strategies to minimize variability and bias associated with manual pipetting in ligand binding assays to assure data quality of protein therapeutic quantification.

Journal of pharmaceutical and biomedical analysis·2010
Same author

Medium- and long-chain triacylglycerols reduce body fat and blood triacylglycerols in hypertriacylglycerolemic, overweight but not obese, Chinese individuals.

Lipids·2010
Same author

[The clinical application of 320-slice Computed Tomography (CT) hepatic artery images in patients with liver transplantation].

Zhonghua gan zang bing za zhi = Zhonghua ganzangbing zazhi = Chinese journal of hepatology·2010

Related Experiment Video

Updated: Oct 3, 2025

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes
11:05

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes

Published on: December 13, 2016

12.3K

Negative or Positive? Loading Area Dependent Correlation Between Friction and Normal Load in Structural

Kehan Wang1,2, Jin Wang2,3, Ming Ma1,2,4

  • 1State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing, China.

Frontiers in Chemistry
|February 18, 2022
PubMed
Summary

Structural superlubricity (SSL) shows reduced friction with smaller loading areas. This study reveals how loading area size impacts friction, offering methods to control ultra-low friction in solid contacts.

Keywords:
frictiongraphenemolecular dynamics simulationnormal loadstructural superlubricity

More Related Videos

Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes
13:57

Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes

Published on: December 24, 2014

14.2K
The Role of Fabric in Frictional Properties of Phyllosilicate-Rich Tectonic Faults
07:39

The Role of Fabric in Frictional Properties of Phyllosilicate-Rich Tectonic Faults

Published on: November 6, 2021

3.3K

Related Experiment Videos

Last Updated: Oct 3, 2025

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes
11:05

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes

Published on: December 13, 2016

12.3K
Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes
13:57

Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes

Published on: December 24, 2014

14.2K
The Role of Fabric in Frictional Properties of Phyllosilicate-Rich Tectonic Faults
07:39

The Role of Fabric in Frictional Properties of Phyllosilicate-Rich Tectonic Faults

Published on: November 6, 2021

3.3K

Area of Science:

  • Tribology
  • Materials Science
  • Nanotechnology

Background:

  • Structural superlubricity (SSL) describes ultra-low friction between solid surfaces.
  • Understanding friction's dependence on loading conditions is crucial for tribological applications.

Purpose of the Study:

  • To investigate the relationship between loading area size and friction in structural superlubricity.
  • To identify mechanisms governing friction variations under different loading conditions.
  • To develop a theoretical model for friction control in SSL systems.

Main Methods:

  • Extensive molecular dynamics simulations were employed.
  • System size and normal load were systematically varied.
  • Friction coefficients were analyzed across different loading area sizes.

Main Results:

  • Two distinct friction-normal load dependencies were observed based on loading area size.
  • Reducing the loading area significantly decreased friction (over 65%) at constant normal load.
  • A strong coupling between normal load and edge effects in SSL systems was identified.

Conclusions:

  • Loading area size is a critical factor influencing friction in structural superlubricity.
  • The findings provide a theoretical basis for controlling friction by manipulating loading conditions.
  • This research offers practical strategies for friction reduction in SSL applications.