Question

Calcule a energia cinética de uma bola de massa 2 kg ao ser arremessada e atingir uma velocidade de 20 m/s​

Answer 1

Resposta:

Ec = 400

Explicação:

Ec = m.v²/2

Ec = 2 . 20²/2

Ec = 20²

Ec = 400

Answer 2

$\Large\displaystyle\text{ \begin{gathered} \hookrightarrow\boxed{\boxed{\bf{ E_C= 400~J }}} \end{gathered} }$

• Explicação:

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

$\Large\displaystyle\text{ \begin{gathered} \sf{E_C = \dfrac{2 \cdot20 {}^{2} }{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{E_C = \dfrac{\backslash\!\!\!2 \cdot400}{\backslash\!\!\!2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \boxed{\boxed{\sf{E_C =400 \: J }}} \end{gathered} }$