Graph Velocity-Time of Usain Bolt 200m Race

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Discussion Overview

The discussion revolves around the request for a velocity vs time graph of Usain Bolt's 200m race, specifically his Olympic performance of 19.30 seconds. Participants explore the characteristics of the graph, potential issues with its accuracy, and methods for obtaining or analyzing the data.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant requests a graph of velocity vs time for Usain Bolt's 200m race.
  • Another participant provides a rough sketch of what the graph might look like.
  • A participant mentions a class discussion regarding the graph's accuracy, indicating that their professor believes the graph is not incorrect but invites further analysis.
  • One participant shares insights from personal experience in sprinting, suggesting that top speed is likely reached between 60m and 80m, and discusses the impact of muscle fatigue on acceleration.
  • A mathematical approach is proposed to determine acceleration and velocity based on the race's total distance and time, highlighting the need for two equations to solve for two unknowns.
  • Another participant suggests that detailed split times for each 10-meter segment would be necessary for accurate analysis, noting the difficulty in finding such data for the 200m race.
  • A participant mentions that information for the 100m race is readily available through a search.
  • One participant references a source that describes Bolt easing up in the last 20 meters, implying that the graph should reflect a decrease in speed towards the end of the race.
  • A clarification is made that the referenced information pertains to the 100m race, not the 200m race that the original poster is interested in.

Areas of Agreement / Disagreement

Participants express various viewpoints regarding the characteristics of the velocity vs time graph and the methods for obtaining accurate data. There is no consensus on the accuracy of the existing graph or the best approach to analyze the race data.

Contextual Notes

Participants note the potential limitations in obtaining accurate split times for the 200m race and the challenges in analyzing video footage for precise data collection.

Nazz_Designs
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I am looking for a graph of velocity vs time for the 200m race of Mr Usain Bolt which he did in 19.30 seconds he did during the olympic races.
I appreciate if someone can provide it in this forum.
Thanks

Ps. sorry if i posted it in the wrong place, but i don't in which category i should put it.
 
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It should be something like this:



|..............
|....
|...
|.______________________________________|___
 
yes, i know the shape.

But during class we had a question which involved the graph.

my professor said that he thinks that the graph is not wrong.
and he told us if anyone can deduct what he thinks the problem is.
he told us if we can, we should find the original graph published.

hope you can help me from the attachment graph.
 
I used to run the bend in the 4x100 and although it feels faster, it isn't as quick as running in a straight line. Having said that it is unlikely that he will be able accelerate once he is onto the straight due to muscle fatigue. Top speed is likely to occur somewhere between 60m and 80m.
 
Suppose that during acceleration period he had a constant acceleration a for t1 seconds. He reached the velocity v1=a*t1. He arrived at coordinate L1= at12/2. Then he ran with v1 the remaining time and covered L2=200-L1 for L2/v1 s. There are two unknowns: a and v1 (or t1), and there are two input data: L=L1+L2= 200m and T=19.3s, for example. Two equations for two unknown parameters suffice to find them.
 
Last edited:
you need the splits from each 10 metre segment.
you can probably find these for 100m race but not sure about 200m. The other option is to analyse a video, but you need clear markers on the track and there may not be any.
 
100m is a google search away.
 
That's 100 meters, not 200 OP is looking for.
 

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