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Verified answer
W = 120 Nkeuntungan mekanis katrol tetap = 1
KM = w/F
F = w/KM
F = 120/1
F = 120 N (katrol tetap)
keuntungan mekanis pada katrol bergerak = 2
F = w/KM
F = 120/2
F = 60 N (katrol bergerak)