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Keadaan peetama
w = 480 N
Lw = 25 cm
F = 160 cm
Lf

F • Lf = w • Lw
160 • Lf = 480 • 25
Lf = 75 cm


keadaan kedua
w = 480 N
Lw = 25 - 5 = 20 cm, akibat digeser
Lf = 75 cm (tetap)
F

F' • Lf = w • Lw'
F' • 75 = 480 • 20
F' = 128 N


perubahan kuasa
∆F = F' - F
∆F = 128 - 160
∆F = - 32 N
(negatif berarti dikurangi)

jawaban [A]

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