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⠀⠀⠀☞ 29,25 [KJ]. ✅
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⠀⠀⠀⭐⠀Para realizar este exercício vamos rever o conceito de energia cinética.⠀⭐⠀
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⠀⠀⠀☔⠀Oi, Regina ✌. Lembrando que a energia cinética equivale ao trabalho (ou seja, a energia necessária) da força que varia a velocidade do corpo do repouso (0 m/s) até a velocidade atual então temos que:
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[tex]\Large\gray{\boxed{\sf\orange{~~\begin{array}{lcr}&&\\&\pink{\text{\huge$\underline{~~\bf Energia~~}$}}\\&\pink{\text{\huge$\underline{~~\bf Cin\acute{e}tica~~}$}}&\\\\\\&\orange{\sf E_{cin} = \tau_{_F} = F \cdot d}&\\\\\\&\green{\clubsuit\underline{~\sf ~Pela~2^{a}~lei~de~Newton:~}\clubsuit}&\\\\&\orange{\sf E_{cin} = m \cdot a \cdot d}&\\\\\\&\green{\clubsuit\underline{~\sf ~Pela~eq.~de~Torricelli:~}\clubsuit}&\\\\&\orange{\sf E_{cin} = m \cdot \dfrac{v_f^2 - v_0^2}{2}}&\\\\\\&\green{\clubsuit\underline{~\sf ~Para~v_{_0} = 0~temos:~}\clubsuit}&\\\\\\&\red{\boxed{\LARGE\pink{\boxed{\begin{array}{lcr}\green{\star}&&\green{\star}\\&\!\!\orange{\bf E_{cin} = \dfrac{m \cdot v^2}{2}}\!\!&\\\green{\star}&&\green{\star}\\\end{array}}}}}&\\&&\end{array}~~}}}[/tex]
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[tex]\Large\gray{\boxed{\sf~~\begin{array}{c}~\\\pink{\underline{~\underline{\text{\LARGE$\bf\square\!\!\boxed{\subset}\boxed{\emptyset}\boxed{\eta}\boxed{\pi}\!\!\!^{^{\square}}\boxed{\alpha}\boxed{\$}\!_{\square}$}}~}}\\\\\\\blue{\begin{cases}\text{$\sf~v = 15~[m/s]$}\\ \text{$\sf~m = 260~[Kg]$}\\ \text{$\sf~E_{cin}=~?~[J]$}\end{cases}}\\\\\!\!\!\!\!\!\!\!^{\underline{\qquad\qquad\qquad\qquad\qquad\qquad\qquad}}\!\!\!\!\!\!\!\!\\\orange{\LARGE\text{$\bf E_{cin} = \dfrac{m \cdot v^2}{2}$}}\\\!\!\!\!\!\!\!\!^{\underline{\qquad\qquad\qquad\qquad\qquad\qquad\qquad}}\!\!\!\!\!\!\!\!\\\blue{\sf E_{cin} = \dfrac{260 \cdot 15^2}{2}}\\\!\!\!\!\!\!\!\!^{\underline{\qquad\qquad\qquad\qquad\qquad\qquad\qquad}}\!\!\!\!\!\!\!\!\\\blue{\sf E_{cin} = 130 \cdot 225}\\\!\!\!\!\!\!\!\!^{\underline{\qquad\qquad\qquad\qquad\qquad\qquad\qquad}}\!\!\!\!\!\!\!\!\\\\\green{\boxed{\blue{\sf~E_{cin} = 29.250~[J]}}~\checkmark}\\\\\end{array}~~}}[/tex]
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[tex]\bf\large\red{\underline{\quad\quad\qquad\qquad\qquad\qquad\qquad\qquad\qquad}}[/tex]☁
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⠀⠀⠀☀️ L͎̙͖͉̥̳͖̭̟͊̀̏͒͑̓͊͗̋̈́ͅeia mais sobre energia cinética:
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https://brainly.com.br/tarefa/49353262 ✈
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[tex]\huge\blue{\text{\bf\quad Bons~estudos.}}[/tex] ☕
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[tex]\quad\qquad(\orange{D\acute{u}vidas\ nos\ coment\acute{a}rios})[/tex] ☄
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[tex]\bf\large\red{\underline{\qquad \qquad \qquad \qquad \qquad \qquad \quad }\LaTeX}[/tex]✍
[tex]\sf(\purple{+}~\red{cores}~\blue{com}~\pink{o}~\orange{App}~\green{Brainly}[/tex] ☘☀❄☃☂☻)
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[tex]\Huge\green{\text{$\underline{\red{\mathbb{S}}\blue{\mathfrak{oli}}~}~\underline{\red{\mathbb{D}}\blue{\mathfrak{eo}}~}~\underline{\red{\mathbb{G}}\blue{\mathfrak{loria}}~}$}}[/tex] ✞
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