[tex]Dane:\\V = 0,01 \ m^{3}\\g = 10\frac{N}{kg}\\a) \ d_1 = 1000\frac{kg}{m^{3}}\\b) \ d_2 = 700\frac{kg}{m^{3}}\\Szukane:\\F_{w_1}, \ F_{w_2}=?\\\\Rozwiazanie\\\\F_{w} = d\cdot g\cdot V\\\\F_{w_1} = d_1\cdot g\cdot V = 1000\frac{kg}{m^{3}}\cdot10\frac{N}{kg}\cdot0,01 \ m^{3} = \boxed{100 \ N}\\\\F_{w_2} = d_2\cdot g\cdot V = 700\frac{kg}{m^{3}}\cdot10\frac{N}{kg}\cdot0,01 \ m^{3} = \boxed{70 \ N}[/tex]
