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w= 900N
lw = 400 cm
F= ...
lf = 600cm
Jwab:
W × lw = F × lf
900 × 400 = F × 600
360000 = 600 F
F = 360000 : 600 = 600N
Keuntungan Mekanis
Km = F/lf
= 600/600 = 1