<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1870-3542</journal-id>
<journal-title><![CDATA[Revista mexicana de física E]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fís. E]]></abbrev-journal-title>
<issn>1870-3542</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-35422018000200232</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cohetes hidráulicos con videos en cámara lenta]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caicedo-Ortiz]]></surname>
<given-names><![CDATA[H.E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santiago-Cortés]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castañeda Fernández]]></surname>
<given-names><![CDATA[H.O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Hernández]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Anahuac Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas y Centro de Nanociencias y Micro y Nanotecnologías ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Física y Matemáticas ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de los Andes Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>64</volume>
<numero>2</numero>
<fpage>232</fpage>
<lpage>240</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-35422018000200232&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-35422018000200232&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-35422018000200232&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este artículo se determina la velocidad y aceleración de un conjunto de cuatro cohetes hidráulicos, empleando el método de mínimos cuadrados y el método de Euler. Los datos de posición y tiempo se obtienen a partir del análisis de videos en cámara lenta (slow motion) del lanzamiento de los cohetes, procesados con el software analizador de videos &#8220;Tracker&#8221;. Este experimento se propone como una herramienta pedagógica para la exploración por parte de estudiantes de ciencia e ingeniería de conceptos básicos de cinemática y dinámica en sistemas con masa y aceleración variables.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In this paper, the velocity and acceleration of four water rockets is determined, using the least squares method and the Euler&#8217;s method. The position and time data are obtained from the analysis of slow-motion videos of the launch of the rockets, processed with the video analyzer software &#8220;Tracker&#8221;. This experiment is proposed as a pedagogical tool for the exploration by students of high school and first semester of sciencie and engineering of basic concepts of kinematics and dynamics in systems with variable mass and acceleration.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cohete hidráulico]]></kwd>
<kwd lng="es"><![CDATA[Tracker]]></kwd>
<kwd lng="es"><![CDATA[videos slow motion]]></kwd>
<kwd lng="es"><![CDATA[ajuste por mínimos cuadrados]]></kwd>
<kwd lng="es"><![CDATA[método de Euler]]></kwd>
<kwd lng="en"><![CDATA[Water rocket]]></kwd>
<kwd lng="en"><![CDATA[Tracker]]></kwd>
<kwd lng="en"><![CDATA[slow motion videos]]></kwd>
<kwd lng="en"><![CDATA[least squares method]]></kwd>
<kwd lng="en"><![CDATA[Euler&#8217;s method]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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