Angular momentum magnitude of a 4kg particle example

Practice question

Question

A 4kg particle moves with velocity v\=3j^m/s at r\=2i^m. What is the magnitude of its angular momentum about the origin?

Options

Choose one · Correct answer highlighted

5 kg m²/s 6 kg m²/s Correct 7 kg m²/s 8 kg m²/s

Explanation

L = r×p = |i^j^k^200030| = k^(2×3−0×0) = 6k^kg m2/s. Magnitude = 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 B is scientifically correct.

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