Practice question
Question
A 2kg mass is attached to a 1m long string and rotates in a horizontal circle. If its linear speed is 3m/s, what is its angular momentum about the center?
Explanation
Angular momentum: L = mvr. m = 2kg, v = 3m/s, r = 1m. L = 2×3×1 = 6kg m2/s. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 6 kg m²/s. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.