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Practice question

MCQ

Question

A force F\=5i^+2j^N acts at r\=−1i^+3j^m. What is the torque about the origin?

Options

Choose one · Correct answer highlighted

Explanation

τ = r×F = |i^j^k^−130520| = k^((−1)×2−3×5) = k^(−2−15) = −17k^Nm. As per NCERT, applying relevant law/formula with correct units and sign convention leads to -17 Nm. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.

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