Practice question

For a rod pivoted at one end: I = 13ML2. M = 7kg, L = 1.5m. I = 13×7×(1.5)2 = 7×2.253 = 5.25kg m2. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 5.25 kg m². This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.