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Related Concept Videos

Fluid Pressure over Flat Plate of Constant Width01:05

Fluid Pressure over Flat Plate of Constant Width

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When a body is submerged in water, it experiences fluid pressure acting normal on its surface and distributed over its area. For better design structures, it is crucial to determine the magnitude and location of the resultant force acting on the surface. In the case of a rectangular plate of constant width submerged in water, the pressure increases with depth, resulting in a linearly varying trapezoidal pressure distribution from the upper to the lower edge of the plate.
The resultant force...
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Fluid Pressure over Curved Plate of Constant Width01:12

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When a curved plate of constant width is submerged in a liquid, the pressure acting normal to the plate varies continuously both in magnitude and direction. Calculating the magnitude and location of the resultant force at a point is often challenging for such cases. One of the methods to determine the resultant force and its location involves separately calculating the horizontal and vertical components of the resultant force. This complex calculation can be simplified by representing the...
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When a flat plate is submerged in a fluid, the fluid exerts pressure on the plate. This pressure can lead to many different phenomena, including drag and buoyancy. To understand the behavior of the fluid over a flat plate of variable width, it is essential to analyze the distribution of the pressure exerted.
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Related Experiment Video

Updated: Sep 30, 2025

Activity of Posterior Lateral Line Afferent Neurons during Swimming in Zebrafish
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Does the Back Plate Position Influence Swimming Start Temporal Characteristics?

Daria Rudnik1,2, Marek Rejman1, Leandro Machado2

  • 1Faculty of Physical Education and Sport, Wrocław University of Health and Sport Sciences, 51-612 Wrocław, Poland.

International Journal of Environmental Research and Public Health
|March 10, 2022
PubMed
Summary

Adjusting the swimming starting block

Keywords:
back platebiomechanicskick-startpreference effectsexstarting platformswimming

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Area of Science:

  • Sports Science
  • Biomechanics
  • Swimming Performance

Background:

  • Optimizing the swimming start is crucial for overall race performance.
  • The starting block's back plate position is a modifiable parameter that may influence technique and outcomes.
  • Previous research has not fully elucidated the sex-specific effects of back plate positioning on swimming starts.

Purpose of the Study:

  • To investigate the impact of back plate position on the block phase movement patterns and overall starting performance in swimmers.
  • To analyze potential sex differences in response to varying back plate positions during swimming starts.

Main Methods:

  • Thirty-eight swimmers (sex unspecified in abstract) performed starts with three back plate positions: preferred, one forward, and one backward.
  • Data collection involved a 3D dynamometric system and video camera analysis.
  • Key performance metrics and kinematic variables of the block phase were assessed.

Main Results:

  • Males achieved a significantly faster 15m start time with their preferred back plate position compared to the backward position.
  • Back plate position influenced rear foot take-off and front foot stand duration, with greater effects observed in males.
  • Females required approximately a two-position adjustment to achieve significant changes, suggesting a sex-specific response.

Conclusions:

  • Back plate position significantly impacts swimming start performance, particularly in males.
  • Adjustments to back plate placement may offer greater performance benefits for male swimmers.
  • Individual preference and sex-specific biomechanics should be considered when optimizing starting block settings.