Practice question

MCQ

Question

A torque of 18Nm is applied to a wheel with moment of inertia 9kg m2. What is its angular acceleration?

Options

Choose one · Correct answer highlighted

1.5 rad/s² 2.0 rad/s² Correct 2.5 rad/s² 3.0 rad/s²

Explanation

τ = Iα. τ = 18Nm, I = 9kg m2. α = τI = 189 = 2rad/s2. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 2.0 rad/s². This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.

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