Jak obliczyć gęstość deski o wymiarach : 27cm, 19cm, 2cm, O ciężarze : 0,62 kg .

27x19=513cm2 513cm2x2cm=1026cm3 1026cm2:0.62kg=636.12

Dane:                                                                                                   Szukane: wymiary- 27cm, 19cm, 2cm                                                            V (objętość)=? Fg (ciężar) =0,62 kg                                                                          g (gęstość)=?                                                                                                               m (masa)=?       m= 0,62kg:10 N/kg =0,062kg V=27cm x 19cm x 2cm=[latex]1026cm^{3}[/latex]= [latex]0,01026m^{3}[/latex] g=0,062 kg: [latex]0,01026m^{3}[/latex] g[latex]approx[/latex] 605 [latex]frac{kg}{m^{3}}[/latex]