Did Usain Bolt REALLY run 100m in 9.63 seconds?

Usain Bolt won gold in the 100m sprint at the London Olympics, clocking 9.63 seconds... but Albert Einstein has something to say about all this? Featuring Tony Padilla - http://twitter.com/DrTonyPadilla Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Videos by Brady Haran Brady's other channels include: http://www.youtube.com/periodicvideos (Chemistry stuff) http://www.youtube.com/sixtysymbols (Physics and astronomy) http://www.youtube.com/DeepSkyVideos (Space stuff) http://www.youtube.com/nottinghamscience (Science and behind the scenes) http://www.youtube.com/foodskey (Food science) http://www.youtube.com/BackstageScience (Big science facilities) http://www.youtube.com/favscientist (Favourite scientists) http://www.youtube.com/bibledex (Academic look at the Bible) http://www.youtube.com/wordsoftheworld (Modern language and culture) http://www.youtube.com/PhilosophyFile (Philosophy stuff)

Comments

1. also why is Usain's watch more accurate than the stadium clock. It could be Usain's is 5millionths of a nanosecond off and the stadium has the right time
2. this is true if the stadium clock timed exactly 9.63 seconds if it timed 5 millionths of a nanosecond 9.63 seconds Usain's watch would also be in the 9.63 second
3. All of this is assuming that the stadium clock was accurate to 17 decimal places though hahaha
4. "Significant Digits" ...One of the fundamental things you learn in physics or engineering. The clock didn't say 9.630000000000000, so we can not estimate out to femtosecond level precision.
5. why do people disliked this video? i found it pretty interesting .-.
6. when he said "a little less", I thought he was going to talk about reaction times: between hearing the start pistol and him starting, and between him actually crossing the finish line and the stop boutton being pushed
7. I want this watch, where I can buy it?
8. 2:20, when Hitler is losing the war...
9. 2:20, when Hitler is losing the war...
10. the spped of light is 299792458 m/s
    just a fact
11. omg this is so relevant!!!
12. He ran it in 9.633654398076147229 exactly. I'm sure.
13. i think the speed of ligth should have a sign. like pi has one .
    it would be easy to do calculaitions witout knowing the accurate number just like we do with pi.
14. Within a closed systems do times delay I mean earths influences. Maybe true outside.
15. I'm trying to wrap my head around this. So if 2 cars move towards eachother at the speed of light, they differ by a factor of sqrt(c^2/c^2) which is 1. if one is not moving and the other at the speed of light, it's a factor of 0? sqrt(0^2/c^2)=0 that makes no sense to me.
    
    What if a car travels at 1/4th of the speed of light, at the other at 100% the speed of light, the factor is then 0,86602540378443864676372317075294? ?_?
16. Well subtract his reaction time to ACTUALLY start running while the clock was going, from the stadium clock's time to find the REAL time it took him to run 100m.
17. They don't take into account how it would take time to react to GO! and will be a few ms slowed because of that
18. I really like the last point. The track shrinks, so he should be DQed. Except, so does the meter! As you move fundamental distances change, which is just ridiculous. Only 1 constant, C
19. so, essentially, to be clear... what a fu*k is this guy talking about ???
    
    i mean... "the track is moving..." ???
20. autism warning.