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Related Concept Videos

Virtual Work01:20

Virtual Work

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...
Virtual Work for a System of Connected Rigid Bodies01:06

Virtual Work for a System of Connected Rigid Bodies

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,...
Principle of Virtual Work: Problem Solving01:13

Principle of Virtual Work: Problem Solving

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,...
Fluid Movement Between Compartments01:18

Fluid Movement Between Compartments

The force applied by fluids against a surface, known as hydrostatic pressure, initiates the transfer of fluid among different compartments. Within our blood vessels, the blood's hydrostatic pressure is a result of the heart's pumping action. At the arteriolar end of capillaries, hydrostatic pressure (capillary blood pressure) exceeds the opposing colloid osmotic pressure created primarily by plasma proteins like albumin. This discrepancy in pressure propels plasma and nutrients from the...
Relative Velocity in One Dimension01:10

Relative Velocity in One Dimension

The understanding of the concept of reference frames is essential to discuss relative motion in one or more dimensions. When we say that an object has a certain velocity, we must state the velocity with respect to a given reference frame. In most examples, this reference frame has been Earth. For instance, if a statement reads that a person is sitting in a train moving at 10 m/s east, then it implies that the person on the train is moving relative to the surface of Earth at this velocity,...
Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the drone...

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Related Experiment Video

Updated: May 20, 2026

Measuring the Kinematics of Daily Living Movements with Motion Capture Systems in Virtual Reality
08:45

Measuring the Kinematics of Daily Living Movements with Motion Capture Systems in Virtual Reality

Published on: April 5, 2018

Moving through virtual reality without moving?

Bernhard E Riecke1, Salvar Sigurdarson, Andrew P Milne

  • 1Simon Fraser University, 250-13450 102nd Avenue, Surrey, BC, V3T 0A3, Canada. ber1@sfu.ca

Cognitive Processing
|July 19, 2012
PubMed
Summary
This summary is machine-generated.

Virtual reality (VR) research shows that even immersive virtual environments may not fully replicate real-world spatial orientation. Naturalistic visual stimuli improved spatial updating, but some users still exhibited "Nonturner" behavior.

More Related Videos

Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation
06:53

Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation

Published on: March 1, 2017

Related Experiment Videos

Last Updated: May 20, 2026

Measuring the Kinematics of Daily Living Movements with Motion Capture Systems in Virtual Reality
08:45

Measuring the Kinematics of Daily Living Movements with Motion Capture Systems in Virtual Reality

Published on: April 5, 2018

Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation
06:53

Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation

Published on: March 1, 2017

Area of Science:

  • Cognitive Science
  • Human-Computer Interaction
  • Neuroscience

Background:

  • Virtual reality (VR) offers controlled, interactive environments for spatial cognition research.
  • Embodied spatial orientation processes, crucial in real-world navigation, may not fully transfer to VR.
  • Failures in spatial updating, like
  • Nonturner
  • behavior, can occur in VR due to lack of physical motion.

Purpose of the Study:

  • To investigate if rich, naturalistic visual stimuli in immersive VR can compensate for the absence of physical motion in spatial updating.
  • To assess the effectiveness of virtual city environments in promoting accurate self-motion perception and orientation.

Main Methods:

  • Twenty-four participants engaged in point-to-origin tasks within a naturalistic virtual city.
  • Participants experienced visually simulated excursions along streets with varying curvature.
  • Performance was evaluated based on the accuracy of pointing responses after simulated movement.

Main Results:

  • A majority of participants (21/24) correctly updated simulated self-motions, showing minimal errors.
  • Three participants demonstrated significant
  • Nonturner
  • behavior, failing to update their heading after simulated turns.
  • While improved over prior stimuli, the naturalistic VR environment was insufficient for obligatory spatial updating in all individuals.

Conclusions:

  • Immersive, naturalistic visual stimuli in VR enhance spatial updating compared to simpler stimuli.
  • VR systems still face challenges in eliciting automatic, embodied spatial orientation processes comparable to the real world.
  • Further research is needed to fully bridge the gap in spatial updating fidelity between virtual and real environments.