5. A disk with a momentum of inertia I and initial angular velocity ω₀ is slowed down by a constant torque τ. What is the stopping time?
(A) ω₀/τ
(B) Iω₀/τ
(C) τ/ω₀
(D) ω₀²/2τ
(E) ω₀I / τ²

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