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\begin{document}

\title{Four Bar Motion~}



\author[1]{Oswal Melean}%
\affil[1]{Affiliation not available}%


\vspace{-1em}



  
  \date{May 23, 2024}


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\subsection*{Project overview~}

{\label{567797}}

In this guided lesson the main goal is to show the student the
applications of the four-bar mechanism and involve them through the
construction of a four-bar mechanism using simple materials.

\subsection*{Age group}

{\label{591277}}

This lesson is intended for 10 - 12-year-old students.~

\subsection*{Duration~}

{\label{934584}}

50 - 60 minutes~

\subsection*{Vocabulary~}

{\label{379218}}

- Mechanism

- Linkage~

- Link

- Crank~

- Rocker

- Inversion~

- Grashof law~

\subsection*{Goals~}

{\label{877548}}

- Understand how the four-bar mechanism works and its usage.

- Understand the different types of four-bar mechanisms and the
relationship between inversion and length of links.

- Create a four-bar mechanism using common materials.~

\subsection*{Materials}

{\label{245681}}

- Thumbtacks.

-~ Icecream Sticks.~

- Scissors.

- Ruler.

\subsection*{Resources~}

{\label{586333}}

- Crank Rocker Mechanism
-~\url{https://www.youtube.com/watch?v=fCcWGXL-2Z8}

-~Design of Machinery: An Introduction to the Synthesis and Analysis of
Mechanisms and Machines~3rd Edici\selectlanguage{ngerman}ón
-~\url{https://www.amazon.com/-/es/Robert-L-Norton/dp/0072864478}

\subsection*{Lesson~}

{\label{532281}}

\subsubsection*{Part 1 ( 25 minutes)}

{\label{517849}}

In this part of the lesson the students will learn about the four-bar
mechanism, thy will learn the application of the crank-rocker mechanism
in machines such as fans and wiper washers, additionally, they will
understand the Grashof law and how to use it in order to make the
linkages the right size for achieving the required movement.~

\subsubsection*{Part 2 ( 30 minutes)~}

{\label{968272}}

For this part of the lesson, the students have to use the Grashof law in
order to choose the sizes of the linkages to make a crank-rocker
mechanism, later they will measure, cut, assemble and decorate, their
own mechanism in groups.

\subsubsection*{Part 3 ( 10 minutes)~}

{\label{673932}}

Every team has to make a presentation of the mechanism in front of the
class.~

~

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