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Verified answer
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Diket :
→ F1 = 40 N
diuraikan menjadi :
F1x = - F1. cos 30° = - 40. 1/2.√3 = - 20√3 N
F1y = F1. sin 30° = 40. 1/2 = 20 N
→ F2 = 60.√3 N
diuraikan menjadi :
F2x = F2. cos 60° = 60.√3. 1/2 = 30.√3 N
F2y = F2. sin 60° = 60.√3. 1/2.√3 = 90 N
→ F3x = 40√3 N
→ F4y = - 60 N
Ditanya :
Besar resultan gaya, FR = ___?
Jawab :
Step 1
---------
Cari Fx = ___?
Fx = F1x + F2x + F3x
Fx = - 20√3 + 30.√3 + 40√3
Fx = 50√3 N
Step 2
----------
Cari Fy = __?
Fy = F1y + F2y + F4y
Fy = 20 + 90 - 60
Fy = 50 N
Step 3
---------
FR = √(Fx² + Fy²)
FR = √((50√3)² + 50²)
FR = √(7500 + 2500)
FR = √10000
FR = 100 N
Jawaban : E
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