[tex]dane:\\s = 4 \ m\\F_1 = 60 \ N\\F_2 = 100 \ N\\szukane:\\W_1, W_2, W = ?[/tex]
Rozwiązanie
W = F × s
a) Praca wykonana osobno:
W₁ = F₁ × s = 60 N × 4 m = 240 J
W₂ = F₂ × s = 100 N × 4 m = 400 N
b) Praca wykonana razem:
Fw = F₁ + F₂ = 60 N + 100 N = 160 N
W = Fw × s = 160 N × 4 m = 640 N
