Practice question
Question
A hollow cylinder of mass 5kg and radius 0.4m rolls without slipping with an angular velocity of 8rad/s. What is its linear speed?
Explanation
v = ωr. ω = 8rad/s, r = 0.4m. v = 8×0.4 = 3.2m/s. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 3.2 m/s. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.