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Related Concept Videos

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Rolling With Slipping

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Rolling with slipping is a physical phenomenon that occurs when a rolling object experiences both rotational and linear motion but also experiences frictional forces that cause slipping. This phenomenon can occur in various situations, such as when a tire rolls on a wet road or a ball rolls on a rough surface.
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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.
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Surveying near highways, rough terrain, or power lines involves significant risks. Working along highways is particularly dangerous and requires the use of warning signs and flagmen. It is safest to avoid working directly on roads and use offsets whenever possible. When highway work is unavoidable, it must follow all safety guidelines. Surveyors should wear bright clothing, such as orange reflective vests, to ensure visibility to motorists, coworkers, and hunters. In construction zones, wearing...
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People have observed the rolling motion without slipping ever since the invention of the wheel. For example, one can look at the interaction between a car's tires and the surface of the road. If the driver presses the accelerator to the floor so that the tires spin without the car moving forward, there must be kinetic friction between the wheels and the road's surface. If the driver slowly presses the accelerator, causing the car to move forward, the tires roll without slipping. It is...
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Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
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Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
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Related Experiment Video

Updated: Mar 8, 2026

Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds
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Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds

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Detecting and eliminating slippery footwear.

C Jones1, D P Manning1, M Bruce1

  • 1a Occupational Health Department , 50/164, Ford Motor Company Limited , Halewood , Liverpool , L24 9LE , UK.

Ergonomics
|January 14, 2017
PubMed
Summary
This summary is machine-generated.

A new walking traction test reliably measures footwear grip on various surfaces. This method helps rank shoe sole performance on wet, oily, and icy floors, improving safety by identifying better-performing footwear.

Keywords:
FootwearRoughnessSlip-resistanceSlipping accidentsSoling

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Area of Science:

  • Occupational Safety and Health
  • Materials Science
  • Biomechanics

Background:

  • Assessing footwear slip resistance is crucial for preventing workplace injuries.
  • Existing methods for measuring coefficient of friction (c.o.f.) may lack reliability or speed.
  • A novel walking traction test offers a promising solution for evaluating footwear grip.

Purpose of the Study:

  • To validate a new walking traction test for measuring footwear-on-surface friction.
  • To rank the grip performance of various footwear solings on different slippery floor conditions.
  • To assess the long-term reliability and consistency of the traction test.

Main Methods:

  • Four experiments were conducted using the walking traction test to rank footwear samples.
  • Tests involved comparing rank orders of footwear on water-wet and oily surfaces.
  • Coefficient of friction (c.o.f.) measurements were taken at intervals for commercially issued footwear.

Main Results:

  • The walking traction test demonstrated reliability and speed in ranking footwear grip.
  • High correlation (rs = 0.893) was found between footwear rankings on wet and oily surfaces in one experiment.
  • Rank orders showed significant similarity across different test methods on oily surfaces (Kendall's w = 8.68).
  • Long-term testing indicated consistent footwear rank orders on both wet (rs = 0.994) and oily (rs = 0.982) surfaces over time.

Conclusions:

  • The walking traction test is a suitable method for ranking footwear grip on slippery floors.
  • Rank orders should be calculated for various surfaces (wet, oily, icy) and lubricant combinations.
  • Regular evaluation of footwear performance throughout its lifespan is necessary for safety.
  • Future efforts will focus on eliminating low-grip footwear from worker options.