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W = 80 N
Lb = 15 cm
Lk = 75 cm
Ditanya , a. F , b. KM
jawab:
F . Lk = W . Lb
75F = 80 . 15
F = 80 . 15 / 75 = 16 N
KM = Lk/Lb = 75/15 = 5