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Pada gambar lampiran:
Mengingat:
T₁ = W₁
T₂ = W₃
Dan:
T₁ - T₂ = 0
Sehingga:
T₁ = T₂
m₁g cos 30 = m₃g cos 60
1/2 m₁√3 = 1/2 m₃ [g dihilangkan]
m₁√3 = m₃
Maka:
m₁ : m₃ = 1 : √3