Added: 2 years ago
From: KoonPhysics
Views: 13,096
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  • However datzfast does ask a good question: what is the true measure of

    knowledge? Does all knowledge have to have a practical use to be of

    value? What's more important, school, knowledge, drunken bar bets, or

    loads of money. We will probably have to agree to disagree on that one.

    BTW great videos. Very useful

  • The cycloid curve and its properties fascinated great scientists like Galileo, Pascal, Huygens, Newton, and the Bernoulli brothers. They designed experiments to test all these properties. The apparatus is now a treasured museum exhibit

    catalogue.museogalileo.it/mult­imedia/BrachistochronousFall.h­tml

    catalogue.museogalileo.it/mult­imedia/TautochronismCycloid.ht­ml

  • The brachistochrone curve  can be applied to earthquake analysis, surfing, the design of grain storage depots, and other engineering questions such as the design of roller coasters (also quite useless)

    online.redwoods.cc.ca.us/instr­uct/darnold/deproj/sp02/pino/i­ntro.pdf

    engineeringsport.co.uk/2010/10­/29/surfing-the-brachistochron­e

    commons.bcit.ca/math/entertain­ment/coaster/index.html

    en.cnki.com.cn/Article_en/CJFD­TOTAL-LSLJ201002007.htm

  • WARNING: MATH AND SCIENCE AHEAD

    Some psychological effects including

    a feeling of insecurity have been reported in some test subjects

    Speak to a qualified scientist before proceeding.

  • one week no takers. stay in school kids, some day i might need to hire you. lol

  • Driving up pageviews for my videos isn't practical enough for ya?! ;)

    Huygens discovered in the 1670s that a pendulum bob constrained to follow a cycloid (the shape of the brahistochrone track) would be isochronous -- period independent of amplitude. This led to more precise timekeeping.

    Precise timekeeping at sea --> better ability to locate your longitude (using the stars) --> 17th Century GPS. Granted, the cycloidal pendulum was quickly replaced by even better watches, but still..

  • beside drunken bar bets how is this knowlege of any pratical use? be specific and use examples.

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