Question

Calcule a energia cinética de uma bola de massa 8 kg ao ser arremessada e atingir uma velocidade de 5 m/s.

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Answer 1

Resposta:

Ec = 100 J

Explicação:

Ec  = m.v²/2

Ec = 8.5²/2

Ec = 8.25/2

Ec = 200/2

Ec = 100 J

Answer 2

$\Large\displaystyle\text{ \begin{gathered} \hookrightarrow\boxed{\boxed{\bf{ E_C= 100~J }}} \end{gathered} }$

• Explicação:

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

$\Large\displaystyle\text{ \begin{gathered} \sf{E_C = \dfrac{8 \cdot5 {}^{2} }{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{E_C = \dfrac{8 \cdot25}{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{E_C = \dfrac{200}{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \boxed{\boxed{\sf{E_C =100 \: J }}} \end{gathered} }$