[tex]m=3 \ kg \\ v=4 \ m/s \\ \boxed{E_c-?} \\ \bold{Rezolvare:} \\ \boxed{E_c= \frac{m \cdot v^2}{2} } \\ \Rightarrow E_c= \frac{3 \ kg \cdot(4 \ m/s)^2}{2} = \frac{3 \ kg \cdot 16}{2} = \frac{48}{2} J \\ \Rightarrow \boxed{\boxed{E_c=24 \ J}}.[/tex]
