[tex]d=10 \ m \\ g=10 \ N/kg \\ E_c=E_p=50 \ J\\ \boxed{m-?} \\ \bold{Rezolvare:} \\ \boxed{E_p=m \cdot g \cdot d} \\ m=\frac{E_p}{g \cdot d} \\ m=\frac{50 \ J}{10 \ N/kg \cdot 10 \ m}=\frac{50 \ J}{100 \ N/kg \cdot m} \\ \Rightarrow \boxed{m=0,5 \ kg=\bold{500 \ g}} [/tex]
