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Virtual Work01:20

Virtual Work

874
The principle of virtual work states that if a body is in static and dynamic equilibrium, then the sum of all the virtual work done by all external forces and couple moments for any given virtual displacement must be zero.
In static equilibrium, a body can experience an imaginary or virtual movement, such as displacement or rotation. The virtual work done by a force is equal to the dot product of force and virtual displacement in the direction of the force. When it comes to virtually rotating a...
874
Principle of Virtual Work: Problem Solving01:13

Principle of Virtual Work: Problem Solving

1.2K
The principle of virtual work is an essential concept in the field of mechanics and engineering. This is used to solve problems related to the equilibrium of a structure or system. It is based on the assumption that if a system is in equilibrium, the work done by all the forces during a virtual displacement is zero. This principle is applied by considering virtual displacements of the system and the corresponding work done by internal and external forces.
To apply the principle of virtual work,...
1.2K
Virtual Work for a System of Connected Rigid Bodies01:06

Virtual Work for a System of Connected Rigid Bodies

410
Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
Next,...
410
Cognitive Development During Adulthood01:30

Cognitive Development During Adulthood

155
Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...
155

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Related Experiment Video

Updated: Jul 18, 2025

A Networked Desktop Virtual Reality Setup for Decision Science and Navigation Experiments with Multiple Participants
06:28

A Networked Desktop Virtual Reality Setup for Decision Science and Navigation Experiments with Multiple Participants

Published on: August 26, 2018

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Studying the Development of Navigation Using Virtual Environments.

Kim V Nguyen1, Merve Tansan1, Nora S Newcombe1

  • 1Department of Psychology and Neuroscience, Temple University.

Journal of Cognition and Development : Official Journal of the Cognitive Development Society
|August 24, 2023
PubMed
Summary
This summary is machine-generated.

Virtual environments (VEs) aid spatial navigation research by standardizing methods and enhancing data precision. Further validation and open sharing of VE tools are crucial for developmental navigation studies.

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Area of Science:

  • Cognitive Science
  • Neuroscience
  • Developmental Psychology

Background:

  • Spatial navigation is key for mobile species' environmental adaptation.
  • Virtual environments (VEs) offer standardization, precision, and comparability in navigation research.
  • Various VE methods exist, including desktop, VR, and mobile applications.

Purpose of the Study:

  • To survey and organize virtual environment paradigms for spatial navigation research.
  • To guide researchers in selecting appropriate VE testing methods.
  • To highlight the representational information indicated by different VE paradigms.

Main Methods:

  • A survey of existing virtual environment testing methods was conducted.
  • Paradigms were organized using a framework based on navigation type (reactive/deliberative) and sensory input.
  • The study reviewed the characteristics and indications of various VE paradigms.

Main Results:

  • Virtual environments provide valuable tools for studying the development of navigation.
  • The chosen framework categorizes VE paradigms based on their navigation characteristics.
  • Different paradigms indicate distinct representational information.

Conclusions:

  • VEs have significantly advanced our understanding of navigational development.
  • Further research is needed on retest reliability, cross-paradigm comparisons, and real-world validation.
  • Open-science repositories for reliable and valid VE assessments are essential for future research.