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= 120 . 1/2√2
= 6√2 N
r1 = 0,5 + 0,5 = 1 m
F2 = 100 N
r2 = 0,5 m
F3 = - 150 sin (180 + 45)
= - 150 .sin 225°
= - 150 . - 1/2√2
= 75√2 N
r3 = 1 m
ditanya = ∑ τ
Σ τ = F1 .r1 + F2.r2 + F3 .r3
= 60√2. 1 + 100 . 0,5 + 75√2 . 1
= 60√2 + 50 + 75√2
= (50 + 135√2) Nm
karena ∑τ bernilai positif maka torsi berputar searah jarum jam