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α =
F2 = 20√3 N
β =
F3 = 30 N
γ =
ditanya : R
Fx1 = F1 .cos α
Fx1 = 20 .cos
= 20 . 1
= 20 N
Fx2 = F2 .cos β
= 20√2 . cos
= 20√3 . 0
= 0 N
Fx3 = F3 .cos ν
= 30 .cos
= 30 . 0,5
= 15 N
Σ Fx = 20 + 0 + 15
= 35 N
Fy1 = F1 .sin α
= 20 .sin
= 20 . 0
= 0 N
Fy2 = F2 . sin Β
= 20√3 . sin
= 20√3 . 1
= 20√3 N
Fy3 = F3 . sin
= 30 .
= 15√3 N
Σ Fy = 0 + 20√3 + 15√3
= 35√3
R² = (Σ Fx)³ + (Σ Fy)²
= 35³ + (35√3)²
= 35² + 35² . 3
= 4 . 35²
R =
= 2 . 35
= 70 N