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Pi and Bouncing Balls - Numberphile

numberphile numberphile·142 videos
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Published on Mar 12, 2012

Professor Ed Copeland on a strange occurrence of Pi involving bouncing balls.

See his calculations at: http://www.flickr.com/photos/numberph...

Check out a computer simulation at http://periodicvideos.blogspot.com/20... (made by a viewer!)

OUR PI VIDEOS ---
ALEX BELLOS AND ROGER DISCUSS ITS HISTORY
http://www.youtube.com/watch?v=yJ-Hwr...
BOUNCING BALLS AND A STRANGE PROPERTY
http://www.youtube.com/watch?v=abv4Fz...
MATCHES HELP FIND PI
http://www.youtube.com/watch?v=sJVivj...
THE SOUND OF PI
http://www.youtube.com/watch?v=wPn4tg...

Website: http://www.numberphile.com/
Numberphile on Facebook: http://www.facebook.com/numberphile
Numberphile tweets: https://twitter.com/numberphile
Videos by Brady Haran

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Top Comments

  • Nate Pearson

    Nate Pearson 1 month ago

    And I wanted to finish my homework tonight... damn...

    · 24

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  • Speglritz

    Speglritz 1 month ago

    Elasticity or inelasticity has nothing to do with the transfer of momentum. It just means that no total energy is lost during the transfer. This is pretty much impossible.

    In short:

    The sum kinetic energy for both balls before the collision = The sum of the kinetic energy for both balls after the collision.

    · 5

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    in reply to Zorawar Singh (Show the comment)

Video Responses

This video is a response to Pi with Pies (director's slice) - Numberphile

All Comments (1,153)

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  • Andrew W

    Andrew W 1 day ago

    Would this ever work in the real world? Such as space where you can disregard friction and air resistance?

    ·

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  • Jack Stratton

    Jack Stratton 2 days ago

    I see pie and bouncing balls, pie is delishious and bouncing balls are amusing, I get f***ing numbers!!!!

    ·

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  • fatchicken18

    fatchicken18 3 days ago

    Sorry, but Brain(Version 5), cannot process this, shutting down....

    ·

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  • mimiklaranathalie

    mimiklaranathalie 3 days ago

    You have a fly on your hardware, try removing it and see if it helps.

    · 2

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    in reply to kaneminik (Show the comment)
  • Youssef Mejri

    Youssef Mejri 4 days ago

    People keep drawing perfect circles with their hands, which makes me feel handicapped!

    ·

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  • Seifeddin TALBI

    Seifeddin TALBI 1 week ago

    can you please explain why the mass of the big ball has to be 16*100^N times the mass of the small ball?

    ·

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  • kaneminik

    kaneminik 1 week ago

    Brain.exe is not responding

    ·

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  • George W.

    George W. 1 week ago

    Just one more video...

    ·

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  • boronguy

    boronguy 1 week ago

    no

    

    ·

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    in reply to Jacob Baillie (Show the comment)
  • DChappelle27

    DChappelle27 1 week ago

    i like how mathematically this theory works, but if you add physics theres no way it could work

    ·

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