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Question

A hollow cylinder of mass 4kg and radius 0.6m rotates at 5rad/s. What is its angular momentum about its axis?

Options

Choose one · Correct answer highlighted

Explanation

I = MR2 = 4×(0.6)2 = 1.44kg m2. L = Iω = 1.44×5 = 7.2kg m2/s. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 7.2 kg m²/s. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.