F[tex]\\_{1\\\\[/tex] = 7 · 5N = 35N (mamy 7 kratek każda kratka to 5 więc 7 razy 5 to 45)
F[tex]_{2}[/tex] = 3 · 5N = 15N
F[tex]_{3}[/tex] = 2 · 5N = 10N
F[tex]\\_{3\\\\\\[/tex] + F[tex]_{\\2}[/tex] = 10N + 15N + 25N
F[tex]\\_{3\\\\\\[/tex] + F[tex]_{\\2}[/tex] ≠ F[tex]_{1}[/tex]
F[tex]\\_{3\\\\\\[/tex] + F[tex]_{\\2}[/tex] < F[tex]_{1}[/tex]
F[tex]_{W[/tex] = 35N - 25N = 10N
(Na rysunku to F[tex]_{W[/tex] musi mieć 2 kratki)
