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Related Concept Videos

Impulse01:13

Impulse

According to Newton’s second law of motion, the rate of change of the momentum of an object is the net external force acting on it. The total change in momentum between two timepoints thus depends on both the external force acting on it and the time over which it acts. Describing this mathematically, the total change of an object’s motion is proportional to the force vector and the time over which it is applied. This product is called impulse.
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Acceleration is in the direction of the change in velocity, but it is not always in the direction of motion. When an object slows down, its acceleration is opposite to the direction of its motion. Although commonly referred to as deceleration, this causes confusion in our analysis as deceleration is not a vector, and does not point to a specific direction with respect to a coordinate system. Therefore, the term deceleration is not used. For example, when a subway train slows down, it...
Kinematic Equations - II01:17

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The second kinematic equation expresses the final position of an object in terms of its initial position, the distance traveled with the initial constant velocity, and the distance traveled due to a change in velocity. Similar to the first kinematic equation, this equation is also only valid when the acceleration is constant throughout the motion of an object.
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When two or more objects collide with each other, they can stick together to form one single composite object (after collision). The total mass of the object after the collision is the sum of the masses of the original objects, and it moves with a velocity dictated by the conservation of momentum. Although the system's total momentum remains constant, the kinetic energy decreases, and thus such a collision is an inelastic collision. Most of the collisions between objects in daily life are...

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Eye Movements in Visual Duration Perception: Disentangling Stimulus from Time in Predecisional Processes
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Published on: January 19, 2024

Time Slows Down during Accidents.

Valtteri Arstila1

  • 1Department of Behavioral Sciences and Philosophy, University of Turku Turku, Finland.

Frontiers in Psychology
|July 4, 2012
PubMed
Summary
This summary is machine-generated.

Time perception can change, with frightening events sometimes seeming to occur in slow motion. This study proposes a new framework suggesting enhanced cognitive processing causes this altered time experience, not just memory effects.

Keywords:
consciousnessperceptionphenomenologytemporal illusionsthe passage of time

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Area of Science:

  • Cognitive Psychology
  • Neuroscience of Time Perception
  • Phenomenology of Extreme Events

Background:

  • The subjective experience of time is variable, notably during high-stress events like accidents.
  • Anecdotal reports describe time slowing down, but explanations often attribute this to memory distortions rather than real-time experience.
  • Existing research has not adequately explained the phenomenology of altered time perception during critical incidents.

Purpose of the Study:

  • To re-examine the comprehensive altered phenomenology reported during accidents.
  • To critique recent experimental approaches that may not fully address the subjective experience of time.
  • To propose a novel theoretical framework for understanding the subjective slowing of time.

Main Methods:

  • Review and reinterpretation of existing anecdotal and theoretical accounts of time distortion.
  • Critical analysis of recent experimental paradigms in time perception research.
  • Development of a new cognitive framework based on enhanced processing speed.

Main Results:

  • The study argues against purely memory-based explanations for time slowing.
  • It posits that rapid enhancement of cognitive processes occurs during critical events.
  • This enhancement leads to a distortion in the perceived relationship between external events and internal processing.

Conclusions:

  • The proposed framework offers a realist explanation for the experience of time slowing down.
  • It suggests that individuals genuinely experience time dilation under specific, high-arousal circumstances.
  • This perspective challenges the notion that altered time perception is solely a post-event memory artifact.