[tex]dane:\\V = 30 \ cm^{3} = 0,000003 \ m^{3}\\d_{c} = 1200\frac{kg}{m^{3}}\\g = 10\frac{N}{kg}\\szukane:\\F_{w} = ?\\\\Rozwiazanie\\\\F_{w} = d_{c}\cdot g\cdot V\\\\F_{w} = 1200\frac{kg}{m^{3}}\cdot10\frac{N}{kg}\cdot0,000003 \ m^{3}\\\\\underline{F_{w} = 0,036 \ N = 36 \ mN}[/tex]
