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KELAS : VIII
Dijawab :
m = 50 kg
Lb = 0,5 m
F = 122,5 N
g = 9,8 m/s2
Ditanyakan : Lk ?
Dijawab :
W = m x g
= 50 x 9,8
= 490 N
Jadi Lengan Kuasa :
Lk = (WxLb) / F
= (490 x 0,5) / 122,5
= 245/122,5
= 2 m
jawaban B