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Practice question

MCQ

Question

Three 2kg masses form an equilateral triangle of side 1m. What is the potential energy? (G\=6.67×10−11N m2/kg2)

Options

Choose one · Correct answer highlighted

Explanation

3 pairs: V = −3Gm2r. V = −36.67×10−11×2×21. V = −3×2.668×10−10 = −8.004×10−10J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to -8.0 × 10⁻¹⁰ J. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.

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