Question

O bara de alam(q-8500) are volumul de 2dm(cubi).Care este masa shi greutatea barei

Answer 1

$\rho=8500 \ kg/m^3 \\ V=2 \ dm^2=0,002 \ m^3 \\ g=10 \ N/kg \\ \boxed{m-?} \\ \boxed{G-?} \\ \bold{Rezolvare:} \\ \boxed{G=m \cdot g} \\ \boxed{\rho= \frac{m}{V} } \\ \Rightarrow m= \rho \cdot V \\ m=8500 \ kg /m^3 \cdot 0,002 \ m^3 \\ \Rightarrow \boxed{m=17 \ kg} \\ \Rightarrow G= 17 \ kg \cdot 10 \ N/kg \\ \Rightarrow \boxed{G=170 \ N}.$