Question

calcule a energia cinética de uma bola de massa 2,8kg ao ser arremessada e atingir uma velocidade de 14m/s​

Answer 1

Explicação:

Ec = m.V^2/2

Ec = 2,8.14^2/2

Ec = 2,8.7.14

Ec = 274,4 J

entendeu ?

Answer 2

$\Large\displaystyle\text{ \begin{gathered} \hookrightarrow\boxed{\boxed{\bf{ E_C= 274,4~J }}} \end{gathered} }$

• Explicação:

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

$\Large\displaystyle\text{ \begin{gathered} \sf{E_C = \dfrac{2,8 \cdot14 {}^{2} }{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{E_C = \dfrac{2,8 \cdot196}{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{E_C = \dfrac{548,8}{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \boxed{\boxed{\sf{E_C =274,4 \: J }}} \end{gathered} }$