F₁L₁ = F₂L₂
F₂ = F₁L₁: L₂ = 20*4: 2 = 40 Н
Если помогло)
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F₁L₁ = F₂L₂
F₂ = F₁L₁: L₂ = 20*4: 2 = 40 Н
Если помогло)