Rotational MotionHard

Question

Calculate the torque about point O in given diagram

Options

A.F₁sinθ₁r₁ - F₂sinθ₂r₂

B.F₁sinθ₁r₁ + F₂sinθ₂r₂

C.F₁sinθ₁r₂ - F₂sinθ₂r₁

D.F₁cosθ₁r₁ - F₂cosθ₂r₂

Solution

Forces F₁ and F₂ produces torque about point O in opposite direction
so t = F₁r₁sinθ₁ - F₂r₂sinθ₂

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