Practice question
Question
A solid sphere of mass 6kg and radius 0.4m has an angular momentum of 11.52kg m2/s. What is its angular velocity?
Explanation
I = 25MR2 = 25×6×(0.4)2 = 0.384kg m2. ω = LI = 11.520.384 = 30rad/s. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 30 rad/s. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
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