Question

10. Calcule a energia cinética de uma bola de massa m = 6 kg ao ser arremessada e atingir uma velocidade de V = 10 m/s. *
a) 100 J
b) 200 J
c) 300 J
d) 150 J
e) 333 J

Answer 1

Resposta:

Alternativa "C". 300 J

Explicação:

Ecin = mv^2/2

Ecin = 6 * 10^2/2

Ecin = 6 * 100/2

Ecin = 600/2

Ecin = 300 Joules

Answer 2

$\Large\displaystyle\text{ \begin{gathered} \hookrightarrow\boxed{\boxed{\bf{ E_C= 300~J }}} \end{gathered} }$

• Explicação:

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

$\Large\displaystyle\text{ \begin{gathered} \sf{E_C = \dfrac{6 \cdot10 {}^{2} }{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{E_C = \dfrac{6 \cdot100}{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{E_C = \dfrac{600}{2} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \boxed{\boxed{\sf{E_C =300 \: J }}} \end{gathered} }$