[tex]S_1=20 \ cm^2=0,002 \ m^2 \\ S_2=250 \ cm^2=0,025 \ m^2 \\ F_2=200 \ N \\ \boxed{F_1-?} \\ \bold{Rezolvare:} \\ \boxed{p_1=p_2} \Rightarrow \boxed{ \frac{F_1}{S_1} = \frac{F_2}{S_2} } \\ \Rightarrow F_1= \frac{F_2}{S_2} \cdot S_1 \\ F_1= \frac{200 \ N}{0,025 \ m^2} \cdot 0,002 \ m^2=8 \ 000 \ Pa \cdot 0,002 \ m^2 \\ \Rightarrow \boxed{F_1=16 \ N}.[/tex]
