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Verified answer
F1 = 30 N ( utara )F2= 40 N ( selatan )
F3= 90 N ( utara )
W = 720 J
Resultan gaya
R = (F1 + F3) - F2
= (30 + 90) - 40
= 120 - 40
= 80 N
Jarak perpindahan
s = W/F
= 720/80
= 9 m