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Fy = F sin α
F1 x = 200,16 cos 36 F1 y = 200,16 sin 36
= 162 = 117,6
F2 x = 300,16. cos (180-51) F2 y = 300,16 sin (180-51)
= - 189,1 = 233,1
F3 x = 155,16 cos (180+59) F3 y = 155,16 sin (180+59)
= - 79,69 = -133,13
∑Fx = F1x + F2x + F3x
= 162 - 189,1 - 79,69
= -106,79
∑Fy = F1y + F2y + F3y
= 117,6 +233,1 - 133,13
= 217,57
R = √ ∑Fx² + ∑Fy²
= √ (-106,79)² + (217,57)²
= √ 11404,1 + 47336,7
= √58740,81
= 242,4 lb
arah :
tan α = ∑Fy / ∑Fx
= 217,57 / - 106,79
= -2,037
α = 116,14