Question

Calcule a energia cinética de uma bola de massa 25 kg ao ser arremessada e atingir uma
velocidade de 2 m/s​

Answer 1

$Ec = \frac{m.v^2}{2} \\\\Ec = \frac{25.(2)^2}{2}\\\\Ec = 50 J$

Answer 2

$\Large\displaystyle\text{ \begin{gathered} \hookrightarrow\boxed{\boxed{\bf{ E_c= 50~J }}} \end{gathered} }$

• Explicação:

$\Large\displaystyle\text{ \begin{gathered} \sf{E_c = \dfrac{m \cdot{v} {}^{2} }{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{E_c = \dfrac{25\cdot2 {}^{2} }{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{E_c = \dfrac{25 \cdot4}{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{E_c = \dfrac{100}{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \boxed{\boxed{\sf{E_c =50 \: J }}} \end{gathered} }$