mohon bantuannyaa ya kaak

Vektor.
Kelas X SMA kurikulum 2013 revisi 2016.

Resultan vektor komponen X:
RX = F₁X - F₂X - F₃X
      = F₁ cos 30° - F₂ cos 30° - F₃ sin 60°
      = (4 N) cos 30° - (5 N) cos 30° - (6 N) sin 60°
      = (4 N)(1/2 √3) - (5 N)(1/2 √3) - (6 N)(1/2 √3) = -3,5√3 N

Resultan vektor komponen Y:
RY = F₁Y + F₂Y - F₃Y
      = F₁ sin 30° + F₂ sin 30° - F₃ cos 60°
      = (4 N)(1/2) + (5 N)(1/2) - (6 N)(1/2) = -1,5 N

Resultan vektor:
|R| = √(RX² + RY²)
|ΣF| = √[(-3,5√3 N)² + (-1,5 N)²] = √39 N