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W = 1.000 N
L = 300 cm = 3m
Lb = 50 cm = 0,5 m
dit : F ?
dijawab :
Lk = L - Lb
= 3 - 0,5
= 2,5 m
jadi Gaya yg diperlukan :
F x Lk = W x Lb
F x 2,5 = 1000 x 0,5
F = 500/2,5
F = 200 N