Practice question
Question
A solid cylinder of mass 5kg and radius 0.5m has an angular momentum of 12.5kg m2/s. What is its angular velocity?
Explanation
I = 12MR2 = 12×5×(0.5)2 = 0.625kg m2. ω = LI = 12.50.625 = 20rad/s. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 20 rad/s. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.