Wednesday, September 23, 2009

PER.1: Usain Bolt's 100m World Record Analysis

Today in class, we examined the concept of an average rate of change by analyzing different intervals of Usain Bolt's 100m World Record run at the 2008 Beijing Olympics. We used data from the article, "Bolt's 9.69s. Analysis of speed during the world record. How fast did Bolt run?" Please add a comment regarding the race interval that your group was responsible for. Include the calculation that you used to determine the average velocity. This may be a good opportunity to try out the sitmo link on the right-hand side of the blog.) See video.
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29 comments:

  1. magzSeptember 23, 2009 at 4:18 PM

    average velocity for 20m-30m:

    =d2-d1/t2-t1
    =30-20/3.78-2.87
    =10/0.91
    =10.09 m/s

    ReplyDelete
  2. RachelleSeptember 23, 2009 at 4:30 PM

    Average velocity for 20 m to 30 m

    = d2-d1/t2-t1
    = 30-20/3.78-2.87
    = 10/.91
    = 10.98 m/s

    I got a different answer then you,magdalena

    ReplyDelete
  3. MattLSeptember 23, 2009 at 5:19 PM

    i got 11.5m/s for 30m to 40m

    ReplyDelete
  4. Michelle JSeptember 23, 2009 at 5:28 PM

    The average velocity between the interval of 50 to 60 m:

    Distance travelled(delta d =d2-d1)=
    60m-50m=10 m
    Time Elapsed (delta t= t2-t1)=
    6.32s- 5.5s= 0.82 s
    Average velocity(delta d/ delta t)= 10m/0.82s= 12.2 m/s

    ReplyDelete
  5. Lawrence WongSeptember 23, 2009 at 5:52 PM

    Interval: 50m - 60m,
    Distance travelled was: 60m - 50m = 10m
    Time Elapsed: 6.32s - 5.5s = 0.82s
    Average Velocity: 10m / 0.82s = 12.2m/z

    ReplyDelete
  6. John. ISeptember 23, 2009 at 6:47 PM

    for the intervel between 30 to 40m the average velocity was 11.5m/s.

    the distance travelled was 10m and the time elapsed during this interval was 0.87s. so in finding the average velocity you divide 10m/0.87s and you attain the answer 11.5m/s.

    ReplyDelete
  7. CurtisMSeptember 23, 2009 at 6:50 PM

    The interval is : 80- 90
    distance travelled is 10m
    time elasped was .83 seconds

    10/.83 = 12.04 m/s

    ReplyDelete
  8. AlexandriaCSeptember 23, 2009 at 7:14 PM

    interval: 90-100m
    distance traveled: 10m
    time: 0.9s
    average velocity: 11.1m/s

    ReplyDelete
  9. Kevin T.September 23, 2009 at 7:37 PM

    Interval: 0-10m
    Distance Traveled: 10m
    Time Elapsed: 1.85s
    Average Velocity: 5.4m/s

    ReplyDelete
  10. celine123September 23, 2009 at 7:42 PM

    interval: 40-50
    distance travelled: 10m
    time elapsed: 0.85s
    average velocity: 10/0.85= 11.76m/s

    ReplyDelete
  11. AnonymousSeptember 23, 2009 at 8:10 PM

    interval: 30 to 40
    distance: 10 m
    time elasped: 0.91
    average velocity: 11.49 m/s

    same answer as Matt and John except I rounded to 2 decimal places

    ReplyDelete
  12. Nick KwonSeptember 23, 2009 at 8:26 PM

    This comment has been removed by the author.

    ReplyDelete
  13. Cath W.September 23, 2009 at 8:45 PM

    AROC [80-90]

    v=Δd/Δt
    =d2-d1 / t2-t1
    =90m-80m / 8.79s-7.96s
    =10m / 0.83s
    =12.048 m/s

    BAM.

    ReplyDelete
  14. Cath W.September 23, 2009 at 8:46 PM

    & kwon, i'm pretty sure you put your decimal place in wrong spot 'cause...
    1.18 m/s is pretty slow. :)

    ReplyDelete
  15. taylorSeptember 23, 2009 at 9:03 PM

    Usain Bolt from 40m to 50m.
    distance travelled: 10 m
    time elapsed: 0.85s
    avergae velocity:11.8m/s

    ReplyDelete
  16. Nick KwonSeptember 23, 2009 at 9:07 PM

    Mr.Bolt from 40m-50m
    d2-d1/t2-t1
    =50m-40m/5.5s-4.65s
    =10m/0.85s
    =11.76m/s
    THUS! Mr.Bolt lives up to his name.

    ReplyDelete
  17. catherine. tSeptember 23, 2009 at 9:12 PM

    Interval: 60-70m

    Distance travelled: 10m

    Time elapsed: 0.82s

    Average Velocity: 12.20m/s

    ReplyDelete
  18. rebecca CSeptember 23, 2009 at 9:44 PM

    Usain Bolt from 90-100:

    distance travelled = 10m
    time elapsed = 0.9s

    avg. velocity = delta d/delta t
    = 10m/0.9s
    = 11.1m/s

    ReplyDelete
  19. GregoryLSeptember 23, 2009 at 9:58 PM

    Interval: 70-80m
    Distance travelled: 10m
    Time Elapsed: 0.9s
    Avg. Velo. :11.11m/s (rounded)

    ReplyDelete
  20. Leroy HSeptember 23, 2009 at 10:05 PM

    Usain Bolt from 70-80m

    distance travelled = 10m

    elapsed time: 0.9s

    average velocity: 11.11m/s

    lolwat pretty speed

    ReplyDelete
  21. AnsonHSeptember 23, 2009 at 10:08 PM

    Interval = 10m - 20m
    Distance Traveled = 10m
    Time Elapsed = 1.02s
    Average Velocity = Delta Distance / Delta Time
    = 10m / 1.02s
    = 9.8m/s
    Therefore from 10m to 20m Usian Bolt's average velocity is 9.8m/s.

    ReplyDelete
  22. angus.lSeptember 23, 2009 at 10:11 PM

    BOLT : 70 - 80 M
    80m - 70m = 10 m
    ;therefore, he travlled 10 m
    elapsed time : 0.9 s
    10m/ 0.9s = 11.11 m/s
    AVERAGE VELOCITY : 11.11 m/s

    ReplyDelete
  23. ElsaWSeptember 23, 2009 at 10:20 PM

    interval: 90-100m
    distance traveled: 10m
    time: 0.9s
    average velocity: 11.1m/s

    ReplyDelete
  24. TeresaSeptember 23, 2009 at 11:41 PM

    Interva is 60m to 70m
    Distance travelled: 70m-60m= 10m
    Time Elapsed: 7.14s-6.32s= 0.82s
    Average Velocity: \Deltad \div \Deltat
    =10m/ 0.82s
    \doteq12.20m/s
    Therefore, Usain Bolt's average velocity from interval 60m-70m was 12.20m/s.

    ReplyDelete
  25. TeresaSeptember 23, 2009 at 11:42 PM

    This comment has been removed by the author.

    ReplyDelete
  26. TeresaSeptember 23, 2009 at 11:43 PM

    ok..I don't get how to use sitmo

    ReplyDelete
  27. VickyK.September 24, 2009 at 6:57 PM

    interval: 60m to 70m
    distance traveled: 10m
    time: 7.14s-6.32s = 0.82s
    average velocity: 12.20m/s

    the average velocity for the interval 60 70m is 12.20m/s

    ReplyDelete
  28. vanessaeSeptember 27, 2009 at 1:19 PM

    For interval 50m-60m

    Distance travelled: 10m
    Time: 6.32s-5.5s=0.82s
    Average Velocity: 10m/0.82s=12.2m/s

    ReplyDelete
  29. GloriaaSeptember 27, 2009 at 9:28 PM

    Interval: 50-60 m
    Distance travelled: 10 m
    Time: 6.32s - 5.5s
    = 0.82s
    Avg velocity = 10/0.82s
    = 12.20 m/s

    ReplyDelete

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