A solid cylinder of mass 5kg and radius 0.4m rolls without slipping with a linear speed of 2.4m/s. What is its angular v
v = ωr. v = 2.4m/s, r = 0.4m. ω = vr = 2.40.4 = 6rad/s. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 6 rad/s. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.