bisa tolong bantu no 3

Untuk sb x
F1 = 60 N
F2x = F2 cos 30 = 120x1/2√3 = 60√3 N
F3x = F3 cos 45 = 100x1/2√2 = - 50√2 N
F4x = F4 cos 30 = 150x1/2√3 = - 75√3 N
Fx = -15√3-50√2

untuk sb y
F2y = F2 sin 30 = 120x1/2 = 60 N
F3y = F3 sin 45 = 100x1/2√2 = 50√2 N
F4y = F4 sin 30 = 150x1/2 = -75 N
Fy = -15+59√2

R = √Fx^2 + Fy^2

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