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      <title>Mapa mental de física     by Bruno Freitas</title>
      <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt</link>
      <description>Criado com carisma</description>
      <language>en-us</language>
      <pubDate>2021-06-03 15:38:42 UTC</pubDate>
      <lastBuildDate>2021-06-04 02:01:20 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
      <image>
         <url>https://padlet.net/icons/png/1f642.png</url>
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      <item>
         <title>1 - Cinemática Vetorial</title>
         <author>bruno18112005</author>
         <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1582900583</link>
         <description><![CDATA[<div><strong>Operações de vetores:</strong><br>d = d<sub>1</sub> + d<sub>2</sub> <br><strong>Adições de vetores:</strong><br>s = a + b<br>s² = a² + b² + 2<sup> .</sup> a<sup> . </sup>b cos a<br><strong>Subtração de vetores:</strong><br>d = a - b = a + (-b)<br><strong>Decomposição vetorial:</strong><br>cos a= s<sub>x</sub> /s -&gt; s<sub>x</sub> = s <sup>.</sup> cos a <br>sen a= s<sub>y</sub>/s -&gt; s = s<sub>y&nbsp; </sub><sub><sup>.</sup></sub><sup> </sup>sen a<br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-06-03 15:50:48 UTC</pubDate>
         <guid>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1582900583</guid>
      </item>
      <item>
         <title>2 - Vetor de velocidade e aceleração intantânea</title>
         <author>bruno18112005</author>
         <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583254047</link>
         <description><![CDATA[<div><strong>Aceleração tangencial (a</strong><strong><sub>t</sub></strong><strong> ) e<br>Aceleração centrípeta (a</strong><strong><sub>c</sub></strong><strong> ):</strong><br>a = a<sub>t</sub>&nbsp; + a<sub>c</sub> <br>a<sub>t</sub>&nbsp; = a = ∆V/∆t<br>a² = a²<sub>t</sub> + a²<sub>c</sub> <br>tg∅= a<sub>c</sub> /a<sub>t</sub></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-06-03 17:42:19 UTC</pubDate>
         <guid>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583254047</guid>
      </item>
      <item>
         <title>3 - Velocidade vetorial média e velocidade escalar média:</title>
         <author>bruno18112005</author>
         <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583316170</link>
         <description><![CDATA[<div>A velocidade escalar média pode ser representada por: v<sub>m</sub>=∆S/∆t<br>A velocidade vetorial média pode ser representada por:<br>v<sub>m</sub>=∆r/∆t<br><strong>Aceleração vetorial média e aceleração escalar média:<br></strong>Aceleração escalar média pode ser expressa por:<strong> </strong>a<sub>m</sub>=∆v/∆t<br>Aceleração vetorial média é representada por: -&gt;a<sub>m</sub>=-&gt;∆v/∆t</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-06-03 18:00:39 UTC</pubDate>
         <guid>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583316170</guid>
      </item>
      <item>
         <title>4 - Leis de Newton</title>
         <author>bruno18112005</author>
         <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583332960</link>
         <description><![CDATA[<div><strong>Força:<br></strong>1N= 1kg <sup>.</sup> m / s²<br><strong>Força resultante e matemática da Segunda Lei de Newton:</strong><br>F<sub>R</sub>= F<sub>1</sub> + F<sub>2</sub> + F<sub>3<br></sub>F<sub>r</sub>= m <sup>.</sup> a<br>a= F<sub>R</sub>/m</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-06-03 18:06:45 UTC</pubDate>
         <guid>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583332960</guid>
      </item>
      <item>
         <title>5 - Forças na Mecânica</title>
         <author>bruno18112005</author>
         <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583372791</link>
         <description><![CDATA[<div><strong>Força peso:<br></strong>F<sub>R</sub>=P<br>P= m<sup> .</sup> a<br>P= m<sup> .</sup> g<br><strong>Força tração:<br></strong>sen a= P<sub>t</sub>/P -&gt; P<sub>t</sub>=P<sup> .</sup> sen a<br>cos a= P<sub>n</sub>/P -&gt; P<sub>n</sub>=P <sup>. </sup>cos a</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-06-03 18:21:31 UTC</pubDate>
         <guid>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583372791</guid>
      </item>
      <item>
         <title>6 - Força elástica:</title>
         <author>bruno18112005</author>
         <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583433800</link>
         <description><![CDATA[<div><strong>Carácterísticas da força elática/Lei de Hooke:</strong><br>F<sub>elást.</sub>=-k<sup> .</sup> x<br>F<sub>elást.</sub>=k<sup> .</sup> x<br><strong>Força de contato:<br></strong>C= N + F<sub>A</sub><strong><br>Intensidade da força de atrito dinâmico:<br></strong>F<sub>Ad</sub>= μ<sub>d</sub><sup> .</sup> N<br><strong>Intensidade da força de atrito estático:<br></strong>F<sub>Ae</sub>=P<sub>t</sub>=P<sup> .</sup> sen a<br>F<sub>Aemáx.</sub>= μ<sub>e</sub> <sup>.</sup> N</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-06-03 18:45:54 UTC</pubDate>
         <guid>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583433800</guid>
      </item>
      <item>
         <title>7 - Sistemas de corpos</title>
         <author>bruno18112005</author>
         <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583494000</link>
         <description><![CDATA[<div><strong>Sistemas sem atrito:<br>Aplicando a segunda lei de Newton ( F</strong><strong><sub>R</sub></strong><strong>=m </strong><strong><sup>.</sup></strong><strong> a) para o sistema (A + B):<br></strong>F=(m<sub>A</sub> + m<sub>B</sub>) <sup>.</sup> a<br>P<sub>A</sub>=(m<sub>A </sub>+ m<sub>B</sub>)<sup> .</sup> a<br><strong>Sistemas com atrito:<br>Podemos observar a aplicação de ( F</strong><strong><sub>R</sub></strong><strong>=m </strong><strong><sup>.</sup></strong><strong> a) para o conjunto formado pelos corpos A e B:<br></strong>F - F<sub>AdA</sub> - F<sub>AdB</sub>= (m<sub>A</sub> + m<sub>B</sub>)<sup> .</sup> a<strong><br>No caso de os blocos estarem escorregando:<br></strong>F<sub>AdA</sub>= μ <sup>.</sup> N<sub>A<br></sub>F<sub>AdB</sub>= μ <sup>.</sup> N<sub>B</sub></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-06-03 19:12:39 UTC</pubDate>
         <guid>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583494000</guid>
      </item>
      <item>
         <title>8 - Tragetórias curvas</title>
         <author>bruno18112005</author>
         <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583524843</link>
         <description><![CDATA[<div><strong>Movimento circular e uniforme (MCU):<br></strong>a<sub>c</sub>= v²/R<br><strong>Período e frequência:<br>Número de voltas&nbsp; &nbsp; &nbsp; Intervalo de tempo<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</strong>1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;-&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;T<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; f&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;-&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;1<br>T= 1/f ou f=1/T<br><strong>Velocidade escalar(v):<br></strong>v=∆S/∆t<br>v=2 <sup>.</sup> π <sup>.</sup> R/T<strong><br>Velocidade angular(ω):<br></strong>ω=∆∅/∆t<strong><br>Relação entre grandezas no MCU:<br></strong>v= ω <sup>.</sup> R<br>ω= 2<sup> .</sup> π/T = 2 . π . f</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-06-03 19:26:15 UTC</pubDate>
         <guid>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583524843</guid>
      </item>
      <item>
         <title>9 - A resultante centrípeta</title>
         <author>bruno18112005</author>
         <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583588855</link>
         <description><![CDATA[<div>F<sub>Rc</sub>=m<sup> .</sup> ac<br>a<sub>c</sub>=v²/R= ω² <sup>.</sup> R<br>F<sub>R</sub>=m<sup> .</sup> v²/R<br>F<sub>R</sub>=m <sup>.</sup> ω² <sup>.</sup> R<br><strong>Automóvel descrevendo uma curva plana:<br></strong>F<sub>Rc</sub>=F<sub>ae</sub><strong><br></strong>F<sub>R</sub>= m . a<sub>c</sub><br>F<sub>ae</sub>= m . v²/R<br>A velocidade será dada por:<br>F<sub>aemáx</sub>= m <sup>.</sup> v²<sub>máx</sub>/R<br>μ<sub>e</sub> <sup>.</sup> N= m <sup>. </sup>v²<sub>máx</sub>/R<br>Para uma curva plana e horizontal: N = P = m ⋅ g:<strong><br></strong>μ<sub>e</sub> <sup>.</sup> m<sup> . </sup>g= m <sup>.</sup> v²<sub>máx</sub>/R<br>v²<sub>máx</sub>= μ<sub>e</sub> <sup>. </sup>R <sup>.</sup> g<br>v<sub>máx</sub>= √μ<sub>e</sub> <sup>. </sup>R <sup>.</sup> g<br><strong>Automóvel descrevendo uma curva sobrelevada:<br></strong>N<sub>y</sub>= N . cos a = P (I)<br>N<sub>x</sub>= N . sen a = F<sub>Rc</sub> (II)<br>Dividindo a relação II pela I, temos:<br>N <sup>.</sup> sen a/ N<sup> .</sup> cos a= F<sub>Rc</sub>/P<br>tg a= m <sup>. </sup>v²/r/m <sup>. </sup>g<br>v²= r <sup>.</sup> g <sup>.</sup> tg a<br>v= √r . g . tg a<br><br><br><br><sub><br></sub><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-06-03 19:57:24 UTC</pubDate>
         <guid>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583588855</guid>
      </item>
      <item>
         <title>10 - Pêndulo simples e cônico</title>
         <author>bruno18112005</author>
         <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583707539</link>
         <description><![CDATA[<div>F<sub>Rc</sub>=T - P<br>T &gt; P<br>T<sub>x</sub>=T <sup>. </sup>sen a = F<sub>Rc</sub> (I)<br>T<sub>y</sub>=T <sup>.</sup> cos a = P (II)<br>Dividindo a relação I pela II:<br>T <sup>.</sup> sen a/ T<sup> .</sup> cos a= m <sup>. </sup>v²/r/m <sup>. </sup>g<br>tg a . r . g<br>v²<br>v= √r . g . tg a</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-06-03 21:07:15 UTC</pubDate>
         <guid>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583707539</guid>
      </item>
      <item>
         <title>11 - Globo da morte </title>
         <author>bruno18112005</author>
         <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583717523</link>
         <description><![CDATA[<div>No ponto 1: F<sub>Rc1</sub>=N<sub>1</sub> - P<br>No ponto 2: F<sub>Rc2</sub>= N<sub>2</sub><br>No ponto 3: F<sub>Rc3</sub>= N<sub>3</sub> + P<br>Assim, podemos calcular essa velocidade como:<br>F<sub>Rc3</sub>= N<sub>3</sub> + P<br>m<sup> .</sup> (v<sub>mín</sub>)²/r= 0 + m . g <br>v<sub>mín</sub>= √r . g</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-06-03 21:14:12 UTC</pubDate>
         <guid>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583717523</guid>
      </item>
      <item>
         <title>               Física</title>
         <author>bruno18112005</author>
         <link>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583729881</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2021-06-03 21:22:57 UTC</pubDate>
         <guid>https://padlet.com/bruno18112005/9sbukwvssm0mhdbt/wish/1583729881</guid>
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