Exam-style question
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Which of the following best describes the relationship between torque (τ) and the moment of inertia (I) for a rotating object that is accelerating with angular acceleration (α)?.
- A.τ = I × α
- B.τ = I ÷ α
- C.τ = α ÷ I
- D.τ = I + α
Model answer
What a good answer should say
- τ = I × α
Explanation
Why this works
The rotational analogue of Newton’s second law states that the net torque acting on a body equals its moment of inertia multiplied by its angular acceleration. This is the fundamental relationship used to link torque and moment of inertia in rotational dynamics.
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