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Question

A solid cylinder of mass 4kg and radius 0.2m rotates at 25rad/s. What is its angular momentum about its axis?

Options

Choose one · Correct answer highlighted

Explanation

I = 12MR2 = 12×4×(0.2)2 = 0.08kg m2. L = Iω = 0.08×25 = 2kg m2/s. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 2.0 kg m²/s. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.