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PHY 7 11 Classical Mechanics and Mathematical Methods 10-10:50 AM MWF Olin 103

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PHY 7 11 Classical Mechanics and Mathematical Methods 10-10:50 AM MWF Olin 103 Plan for Lecture 6: Continue reading Chapter 3 Further development of the “calculus of variation”. Brachistochrone problem: (solved by Newton in 1696)

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slide1

PHY 711 Classical Mechanics and Mathematical Methods

  • 10-10:50 AM MWF Olin 103
  • Plan for Lecture 6:
      • Continue reading Chapter 3
        • Further development of the “calculus of variation”

PHY 711 Fall 2013 -- Lecture 6

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Brachistochrone problem: (solved by Newton in 1696)

http://mathworld.wolfram.com/BrachistochroneProblem.html

A particle of weight mg travels frictionlessly down a path of shape y(x). What is the shape of the path y(x) that minimizes the travel time from

y(0)=0 to y(p)=-2 ?

PHY 711 Fall 2013 -- Lecture 6

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Parametric equations for Brachistochrone:

PHY 711 Fall 2013 -- Lecture 6

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Brachistochrone problem -- summary

Parametric equations;

PHY 711 Fall 2013 -- Lecture 6

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Brachistochrone problem -- summary

PHY 711 Fall 2013 -- Lecture 6

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Shape of a rope of length L and mass density r hanging between two points

x1 y1

x2 y2

PHY 711 Fall 2013 -- Lecture 6

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Lagrange multiplier

PHY 711 Fall 2013 -- Lecture 6

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Summary of results

PHY 711 Fall 2013 -- Lecture 6

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Application to particle dynamics

PHY 711 Fall 2013 -- Lecture 6

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