The Phone Book Myth Revisited and a Question

13
The Phone Book Myth Revisited and a Question Jorge Ballester Emporia State University

description

The Phone Book Myth Revisited and a Question. Jorge Ballester Emporia State University. YouTube Videos. Discovery Mythbusters -The Phone Book Myth Mythbusters -Phone Book Friction Video Conclusion : The phone books can be ripped apart but cannot be slid apart. Post-it ® Note Analog. - PowerPoint PPT Presentation

Transcript of The Phone Book Myth Revisited and a Question

Page 1: The Phone Book Myth Revisited and a Question

The Phone Book Myth Revisited and a Question

Jorge BallesterEmporia State University

Page 2: The Phone Book Myth Revisited and a Question

YouTube Videos

• Discovery Mythbusters-The Phone Book Myth

• Mythbusters-Phone Book Friction

• Video Conclusion: The phone books can be ripped apart but cannot be slid apart.

Page 3: The Phone Book Myth Revisited and a Question

Post-it® Note Analog

Improved design by Travis Finney

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Field Testing

Model: Charlie Mahoney

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Chinese Finger Trap Model

http://couragetostutter.net

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𝑎𝑏 ≈

1200≪1

a=page thickness

N pages on each side

1𝑁 ≪1

Page 7: The Phone Book Myth Revisited and a Question

mth page

Tm

fm+1

fm

Pm

Pm+1

−𝑃𝑚+1+𝑃𝑚−𝑇𝑚𝑠𝑖𝑛𝜃𝑚=0

m

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Assume uniform tension

• F=applied force)

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Critical Number of Pages

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Good

• Reasonable physical basis

• Relatively simple formula

• Prediction of critical number of pages

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Bad

• Uniform tension assumption

• Testing all parameters is elusive.

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Ugly

• Interleaving the pages is inherently imprecise.

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Questions:

• Why do we do this?

• Why don’t we do this?


E myth revisited

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