GKFix MCQ Question

How is the angle φ₁ related to angle α₁ in the context of force and radius vector?

• A. φ₁ = α₁
• B. φ₁ - α₁ = 90°
• C. φ₁ + α₁ = 180°
• D. φ₁ + α₁ = 90°