Question

30kg velocidade de 20m/s energia cinética é?

Answer 1

$\large\displaystyle\sf E_c=\dfrac{m\cdot v^2}{2}$

$\large\displaystyle\sf E_c=\dfrac{30\cdot20^2}{2}$

$\large\displaystyle\sf E_c=\dfrac{30\cdot400}{2}$

$\large\displaystyle\sf E_c=\dfrac{12000}{2}$

$\large\displaystyle\text{ \boxed{\boxed{\sf E_c=6000\,J}} }$