[tex]dane \ (z \ wykresow):\\F_1 = 5 \ N\\s_1 = 2 \ m\\F_2 = 4 \ N\\s_2 = 3 \ m\\\\F_3 = 2 \ N\\s_3 =3 \ m\\szukane:\\W_{c} = ?\\\\W = F\cdot s\\\\W_1 = F_1\cdot s_1 = 5 \ N\cdot2 \ m = 10 \ J\\\\W_2 = F_2\cdot s_2 = 4 \ N\cdot3 \ m = 12 \ J\\\\W_3 = 2 \ N\cdot3 \ m = 6 \ J\\\\W_{c} = W_1+W_2+W_3}\\\\W_{c} = 10 \ J + 12 \ J + 6 \ J = 28 \ J[/tex]
