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w = F.s
= (2000 + 1700 + 1500) 80
= 5200 x 80
= 416000 Nm
kalo beda arah, gambarnya seperti apa sist ?
=2000×80
=160000 N
W₂=F₂×S
W₂=1700×80
W₂=136000 N
W₃=-(F₃×S)
W₃=-(1500×80)
W₃=-120000 N
Wtotal= W₁+W₂+W₃
Wtotal= 160000+136000-120000
wtotal= 176000 N