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AB = 2/3 AC
F = 50 N
Ditanyakan : W ?
Dijawab :
BC = AC - AB
= 3/3 - 2/3
= 1/3 AC
WxAB = F x BC
Wx2/3AC = 50 x 1/3AC ... AC habis dibagi
W x 2/3 = 50/3
W = 50/3 / 2/3
W = 50/3 x 3/2
W = 150/6
W = 25 N
jawaban B